Article
Agronomy
Phirose Kemprai, Pranjit Kumar Bora, Siddhartha Proteem Saikia, Saikat Haldar
Summary: This study identified chavibetol as the major active compound in betel oil, which exhibited potent phytotoxicity towards wheatgrass and other weeds. The inhibitory effects were observed in both water and agar medium, with IC50 values ranging from 23.2 to 122.7 μg mL(-1). These findings highlight the potential of chavibetol as a natural herbicide for weed management.
PEST MANAGEMENT SCIENCE
(2023)
Article
Engineering, Chemical
Viplav Hari Pise, Shivanand S. Shirkole, Bhaskar N. Thorat
Summary: This study investigated the microstructural changes, shrinkage and swelling of cellular matrix, and retention of oil reserves during the dehydration process of Piper betel leaves. The results showed that the oil cells were protected and preserved at temperatures between 40 and 50 degrees C, while they ruptured at 60 degrees C.
Article
Food Science & Technology
Ayesha Noor, Musa Al Murad, A. Jaya Chitra, Spoorthy N. Babu, S. Govindarajan
Summary: This study focused on synthesizing microspheres of Piper betle polyphenols and evaluated the impact of alginate encapsulation on stability, bioavailability, and therapeutic properties. The results showed that encapsulation improved stability, increased bioavailability, and retained antioxidant and antidiabetic properties.
Article
Environmental Sciences
Mridul Umesh, Debasree Dutta Choudhury, Sabarathinam Shanmugam, Sivarasan Ganesan, Mishal Alsehli, Ashraf Elfasakhany, Arivalagan Pugazhendhi
Summary: This research work focuses on the biosynthesis of hydroxyapatite (HAp) from eggshells and the green synthesis of HAp from eggshells with incorporation of Piper betel leaf extract using the microwave conversion method. The study highlights the significant antibacterial and biofilm inhibitory activities of the Piper betel leaf extract coated HAp (PBL-HAp), demonstrating promising potential for the development of potent dental biomaterials.
ENVIRONMENTAL RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Mohamed Tagrida, Thummanoon Prodpran, Bin Zhang, Rotimi E. Aluko, Soottawat Benjakul
Summary: Liposomes loaded with betel leaf ethanolic extract using thin film hydration method showed better physical characteristics, higher encapsulation efficiency, lower releasing efficiency, and higher antioxidant stability than those prepared using ethanol injection method. This suggests that the thin film hydration method could be a suitable approach to prepare stable liposomes loaded with betel leaf extract for food applications.
JOURNAL OF FOOD BIOCHEMISTRY
(2021)
Article
Chemistry, Applied
Mohamed Tagrida, Krisana Nilsuwan, Saqib Gulzar, Thummanoon Prodpran, Soottawat Benjakul
Summary: The mechanical, barrier, and thermal properties of biodegradable films composed of gelatin/chitosan blends with and without betel leaf ethanolic extract (BLEE) were investigated. The addition of BLEE improved the elasticity and heat-seal ability of the films, while the seal ability decreased with increasing chitosan proportion. Films containing 2% BLEE exhibited enhanced ultraviolet and visible light barrier abilities and reduced water vapor permeability. The incorporation of BLEE also led to decreased swelling and water solubility of the films, increased antioxidant and antibacterial activities, and improved thermal stability. Therefore, gelatin/chitosan films containing BLEE could serve as active packaging materials with satisfactory properties.
FOOD HYDROCOLLOIDS
(2023)
Article
Environmental Sciences
Sujosh Nandi, Proshanta Guha
Summary: This study evaluated the extraction of betel leaf petioles using four different solvents. The results showed that acetone-based extract had the best antioxidant and antimicrobial activities, with high sensitivity against B. subtilis. GC-MS analysis revealed the presence of four major compounds in the acetone extract. Overall, acetone extract can be considered as an alternative to synthetic active ingredients in the future.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Md Badrul Alam, Na Hyun Park, Bo-Rim Song, Sang-Han Lee
Summary: This research aimed to understand the antioxidant and depigmenting properties of betel leaves extract and its underlying mechanism. The study showed that betel leaves extract demonstrated strong antioxidant activity and inhibited the formation of melanin. It also suppressed the synthesis of key proteins involved in melanogenesis and induced autophagy, leading to significant anti-melanogenic effects.
Article
Engineering, Environmental
Vishram D. Hiremani, Naganagouda Goudar, Tilak Gasti, Sheela Khanapure, Vinayak N. Vanjeri, Sarala Sataraddi, Oshin Jacintha D'souza, Shyam Kumar Vootla, Saraswati P. Masti, Ravindra B. Malabadi, Ravindra B. Chougale
Summary: This study developed eco-friendly PVA/OMS/BLE blend films using a cost-effective technique, where the addition of BLE enhanced antibacterial and antioxidant properties, as well as improved water vapor transmission rate and oxygen permeability. Therefore, PVA/OMS films containing BLE can be used for the development of active packaging materials.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Review
Biochemistry & Molecular Biology
Leny Heliawati, Seftiana Lestari, Uswatun Hasanah, Dwipa Ajiati, Dikdik Kurnia
Summary: Based on data from The Global Burden of Disease Study in 2016, dental and oral health problems, especially dental caries, affect almost half of the world's population. One of the main causes of dental caries is the pathogenesis of Streptococcus mutans. Prevention can be achieved by controlling S. mutans using an antibacterial agent. However, long-term use of chlorhexidine, the most commonly used antibacterial for dental caries, may lead to resistance and side effects. Therefore, the discovery of a natural antibacterial agent is urgently needed. Piper crocatum Ruiz and Pav has the potential to be used as a natural antibacterial agent for dental and oral health problems, as it contains active compounds that are effective against S. mutans.
Article
Food Science & Technology
Mohamed Tagrida, Soottawat Benjakul
Summary: This study found that liposomes loaded with Betel leaf ethanolic extract can enhance its antibacterial activity and effectively inhibit various bacterial strains. Combined with modified atmosphere packaging and non-thermal plasma treatment, it can prolong the preservation of tilapia slices effectively.
Article
Agricultural Engineering
Jamiu Mosebolatan Jabar, Matthew Ayorinde Adebayo, Mariam Taiwo Oloye, Adewumi Yetunde Adenrele, Adeola Timilehin Oladeji
Summary: This study explored the use of microwave-aided extraction technique as an alternative to conventional extraction techniques in order to address the issues of long extraction time, low color yield, and colorfastness associated with natural dyes. The extraction parameters for cocoa leaf were optimized and the dyeing conditions for achieving desired color strength and colorfastness on wool fabric were varied. The colorimetric properties of the microwave-aided cocoa leaf extract dyed wool fabrics were compared to those of conventionally dyed fabrics. The use of microwave irradiation increased dye yield, reduced extraction time, and improved tint yield. The optimal dyeing conditions were determined, and post-mordanting with chemical-mordants and herbal-anchors further enhanced the color strength and colorfastness of the dyed fabric. The dyed fabrics also exhibited improved antioxidant, antibiotic, and ultraviolet protection properties, making them suitable for healthcare applications. The findings suggest that microwave-assisted cocoa leaf extract has the potential to be a sustainable colorant for producing healthcare wears.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Polymer Science
Bao-Tran Tran Pham, Hue-Tran Thi Dang, Dai Van Nguyen, Long Giang Bach, Thanh Khoa Phung, Thuong Thi Nguyen
Summary: This study aimed to produce multi-functional active film by adding Sonneratia ovata leaf extract (SOE) and Piper betel L. oil (PBLO) to polyvinyl alcohol/chitosan (PCs). The results showed that the SOE-added PCs film had a compact structure and exhibited lower swelling degree and higher mechanical strength compared to the neat PCs. The co-supplementation of PBLO increased the swelling degree due to the more open structure and improved the UV-barrier, antimicrobial, and antioxidant properties of the PCs film.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Energy & Fuels
Sujosh Nandi, Proshanta Guha
Summary: In this study, cellulosic fibres were extracted from betel leaf petioles using a pre-hydrolysis treatment with HCl. The treatment effectively removed hemicellulose and lignin, resulting in cellulosic fibres with a higher cellulose percentage of 81.15% compared to fibres without the treatment. The pre-hydrolysis treatment also improved the crystallinity index and thermal stability of the fibres, making them a suitable precursor for nano-cellulose production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Biochemistry & Molecular Biology
Monika Moond, Sushila Singh, Seema Sangwan, Savita Rani, Anuradha Beniwal, Jyoti Rani, Anita Kumari, Indu Rani, Parvesh Devi
Summary: Silver nanoparticles (AgNPs) were synthesized using Trigonella foenum-graceum L. leaf extract, which contains phytochemicals that play important roles in the reduction of silver ions to AgNPs. The synthesized AgNPs had spherical shapes with a diameter of 4-22 nm. The antimicrobial and antioxidant activities of AgNPs and leaf extract were evaluated, and AgNPs showed significant efficacy in both aspects. These findings suggest that AgNPs could be utilized in biomedical applications and drug delivery systems.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Umarfarooq R. Bagwan, Irfan N. Shaikh, Ramesh S. Malladi, Abdulazizkhan L. Harihar, Shirajahammad M. Hunagund
JOURNAL OF RARE EARTHS
(2020)
Review
Biochemical Research Methods
Shivaprasadagouda Patil, Vani R. Desai, Mahanthesh M. Basanagouda, Shirajahammad M. Hunagund, Suresh M. Tuwar, Ashok H. Sidarai
JOURNAL OF FLUORESCENCE
(2020)
Article
Chemistry, Multidisciplinary
AfraQuasar A. Nadaf, Shruti Dixit, Mohammed Yaseen, Shivaraj Mantur, Mahesh S. Najare, Shrinivas Joshi, Shyamkumar Vootla, Imtiyaz Ahmed M. Khazi
Article
Biochemistry & Molecular Biology
Naganagouda Goudar, Vinayak N. Vanjeri, Shruti Dixit, Vishram Hiremani, Sarala Sataraddi, Tilak Gasti, Shyam Kumar Vootla, Saraswati P. Masti, Ravindra B. Chougale
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Biotechnology & Applied Microbiology
Delicia Avilla Barretto, Shyam Kumar Vootla
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2020)
Article
Entomology
Triveni Nallabothula, Santosh Kumar Hulikal Shivashankar, Shyam Kumar Vootla
Summary: The study focused on the differences in immune response to nuclear polyhedrosis virus (NPV) between domestic silkworm and wild silkworm, with the latter showing no documented infection by NPV; Through proteomic analysis, the upregulation of myotubularin-related protein (MTMR6) and serpin-like protein was observed at 72 hours post infection in the wild silkworm, suggesting their involvement in host immunity and suppression of viral replication. This observation was further confirmed by qPCR studies showing a decrease in viral load in the wild silkworms from 72 hours post infection.
PHYSIOLOGICAL ENTOMOLOGY
(2021)
Article
Chemistry, Medicinal
Aravind R. Nesaragi, Ravindra R. Kamble, Shruti Dixit, Barnabas Kodasi, Swati R. Hoolageri, Praveen K. Bayannavar, Jagadeesh Prasad Dasappa, Shyamkumar Vootla, Shrinivas D. Joshi, Vijay M. Kumbar
Summary: A novel and green synthetic approach was developed to produce a series of compounds with high COX-2 selectivity, which also demonstrated antioxidant activity.
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
(2021)
Article
Biochemistry & Molecular Biology
Tilak Gasti, Shruti Dixit, Oshin J. D'souza, Vishram D. Hiremani, Shyam Kumar Vootla, Saraswati P. Masti, Ravindra B. Chougale, Ravindra B. Malabadi
Summary: The study aimed to prepare CMPR smart films based on CS/MC matrix and PR anthocyanin, showing excellent physical properties and antibacterial activity, which can be used for the preservation of marine products.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Vishram D. Hiremani, Mallikarjun H. Anandalli, Tilak Gasti, Shruti Dixit, Praveen K. Bayannavar, Saraswati P. Masti, R. F. Bhajantri, Shyam Kumar Vootla, Bhagyavana S. Mudigoudra, Ravindra B. Chougale
Summary: This study focused on fabricating 7H4MC dye doped PVA/OMS blend films using a user-friendly solvent casting technique, and investigated their thermal stability, surface morphology, and optical properties. The results showed that the blend films were thermally stable, had smooth surfaces, and exhibited reduced optical band gap and enhanced fluorescence emission when doped with 7H4MC. Additionally, the PSC blend films showed superior antimicrobial properties compared to control blend films, making them suitable materials for optical and biological applications.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Engineering, Environmental
Vishram D. Hiremani, Naganagouda Goudar, Tilak Gasti, Sheela Khanapure, Vinayak N. Vanjeri, Sarala Sataraddi, Oshin Jacintha D'souza, Shyam Kumar Vootla, Saraswati P. Masti, Ravindra B. Malabadi, Ravindra B. Chougale
Summary: This study developed eco-friendly PVA/OMS/BLE blend films using a cost-effective technique, where the addition of BLE enhanced antibacterial and antioxidant properties, as well as improved water vapor transmission rate and oxygen permeability. Therefore, PVA/OMS films containing BLE can be used for the development of active packaging materials.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Chemistry, Applied
Tilak Gasti, Shruti Dixit, Vishram D. Hiremani, Ravindra B. Chougale, Saraswati P. Masti, Shyam Kumar Vootla, Bhagyavana S. Mudigoudra
Summary: The study developed clove essential oil loaded Chitosan-ZnO hybrid nanoparticles integrated chitosan/pullulan nanocomposite films with improved film properties in several aspects; the composite film showed antioxidant and antibacterial activities, and extended the shelf-life of chicken meat.
CARBOHYDRATE POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
Vishram D. Hiremani, Sheela Khanapure, Tilak Gasti, Naganagouda Goudar, Shyam Kumar Vootla, Saraswati P. Masti, Ravindra B. Malabadi, Bhagyavana S. Mudigoudra, Ravindra B. Chougale
Summary: Bioactive films of chitosan/white turmeric were successfully prepared using solvent casting technique, showing good physicochemical and biological properties for active packaging applications, including improved antimicrobial activity, antioxidant activity, and reduced water vapor transmission rate and oxygen permeability. The inclusion of white turmeric also led to enhanced tensile properties, smooth surface morphology, water resistance, UV barrier properties, and reduced oil absorption rate in the blend films. The films were found to be effective in extending the shelf life of foodstuff due to their eco-friendly nature.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
C. H. Aminath Rajeena, Vinuta Kamat, Veerabhadragouda B. Patil, Suresh P. Nayak, Sheela Khanapure, Delicia A. Barretto, Shyam K. Vootla
Summary: A novel series of pyrazoline analogues linked by 1,2,3-triazole were synthesized and characterized by various analytical techniques. The synthesized compounds were evaluated for their antibacterial activities against both Gram-positive and Gram-negative strains, showing strong inhibition against Pseudomonas aeruginosa and Staphylococcus aureus by specific substituents.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Applied
Barnabas Kodasi, Shrinivas D. Joshi, Ravindra R. Kamble, Rangappa S. Keri, Praveen K. Bayannavar, Aravind R. Nesaragi, Shruti Dixit, Shyam Kumar Vootla, Tukaram Metre
Summary: A green and efficient method for the synthesis of 1,2,3-triazoles was developed using click chemistry on copper microcrystals. The method showed short reaction times, high yields, and excellent purity, with a catalyst that is environmentally friendly. The synthesized compounds exhibited promising antifungal activity.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Swati R. Hoolageri, Aravind R. Nesaragi, Ravindra R. Kamble, Shruti Dixit, Shyamkumar Vootla, Shrinivas D. Joshi, Sabakauser J. Shaikh
Summary: A green synthetic route for the synthesis of biologically active hybrid derivatives has been studied. The synthesized compounds showed excellent antifungal activity.
Article
Chemistry, Physical
Wiem Bouali, Muejgan Yaman, Nurgul Seferogu, Zeynel Seferogu
Summary: Novel chemosensors, including coumarin hydrazide, were synthesized and demonstrated the ability to detect cyanide ions through absorption and fluorescence turn-off response. The reaction mechanism between the sensors and the ions was determined through experimental and theoretical studies. The sensors exhibited high detection ability and effectiveness.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Parinaz Abdollahian, Hassan Heidari, Soheila Hassanzadeh, Mohammad Hasanzadeh
Summary: This study successfully synthesized various types of thiolated-graphene quantum dots (GQDs) and utilized them in a one-droplet microfluidic paper-based analytical device for the simultaneous multi-sensing of heavy metal ions. The GQDs were functionalized and stabilized on the surface of hydrophobic fiber-glass, enabling colorimetric chemosensing of ions including iron, copper, cobalt, mercury, chrome, manganese, and nickel. The results were confirmed using fluorescence spectrometry, and the platform showed potential for facile metal ion detection in human urine models and environmental fluids.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
S. L. Barrett, C. Meyer, E. Cwiklik, V Fieglein, M. Burns, J. Guerrero, W. J. Brittain
Summary: Laboratory illumination is strong enough to create a photostationary state (PSS) of amphiphilic azo-benzene compounds in water. The [cis]PSS/[trans]PSS ratios were observed to be 0.33-1.2 in D2O and 0.37-3.8 in dimethyl sulfoxide-d6. ortho-Fluoroazobenzene amphiphiles show higher cis-isomer concentration at equilibrium compared to non-fluorinated compounds due to differences in optical absorption profiles. The kinetics of isomerization were measured using UV-Vis spectroscopy and the ratio of trans-to-cis rates does not directly correlate with the observed PSS. The half-life for PSS formation is 40 minutes for fluorinated compounds and 80 minutes for non-fluorinated compounds.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Jalil Khodayari, Karim Zare, Omid Moradi, Mohammadreza Kalaee, Niyaz Mohammad Mahmoodi
Summary: In this study, an eco-friendly biocomposite (CMC/MIL/CuO) was synthesized and characterized, and its ability to decolorize Acid Blue 92 dye was investigated. The results showed that CMC/MIL/CuO can be used as a suitable photocatalyst for dye decolorization.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Bo Ma, Qian Xu, Huajun Yao, Yalin Chen, Yiyang Wang, Yunfei Yang, Hongfang Shen, Youjun Lu
Summary: This study designed an integrated structure of Cu2O@Au/Cu2O heterostructure particles, which achieved significantly enhanced photocatalytic performance by simultaneously considering the integrated structural characteristics and localized surface plasmon resonance (LSPR) effect. Experimental characterization and theoretical simulation confirmed the three-in-one synergy of the integrated heterostructure, including the LSPR effect of Au nanoparticles, the light scattering based on core-shell heterostructure, and the effective charge separation based on inter-embedded heterostructure. The concept of integrated heterostructure cooperated with LSPR effect provides a new strategy for designing future catalysts.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Robert G. H. Marks, Sarah P. Rockel, Klaus Kerpen, Holger Somnitz, Philipp R. Martin, Maik A. Jochmann, Torsten C. Schmidt
Summary: This study investigated the pH-dependent photolysis of phosphonates in aqueous solutions and analyzed the transformation products. The results showed that the photolysis rate of phosphonates was influenced by pH and light conditions. Furthermore, the carbon kinetic isotope effects varied for different types of phosphonates.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
T. M. Naren Vidaarth, S. Surendhiran, K. S. G. Jagan, S. Savitha, K. S. Balu, A. Karthik, B. Kalpana
Summary: In this study, magnesium oxide nanoparticles were synthesized using plant seed extracts, which exhibited excellent performance in removing dyes from textile water bodies. These nanoparticles also showed strong antibacterial and antioxidant properties.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Mikhail Yu. Ovchinnikov, Vyacheslav A. Antipin, Sergey L. Khursan
Summary: In this study, the recombination of separated ion-radical states (SIRS) in PAPh films was analyzed, and it was found that the contribution of X-SIRS recombination to total luminescence varies with different environments. It was also shown that the recombination of labile SIRS is independent of the nature of the atmosphere. The study theoretically substantiated that SIRS recombination can occur via the transfer of both positive and negative charges, and the efficiency of thermal activation of recombination processes depends on the ratio of radiant and conductive channels of energy transfer.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Sumaira Naeem, Tayyaba Mubashir, Mudassir Hussain Tahir, Jawayria Najeeb, Ahmed Z. Dewidar, Hosam O. El-ansary, Silas Lagat, Anthony Pembere
Summary: This study presents an alternative methodology using machine learning for the selection of novel organic molecules to develop high-performance organic solar cell devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
D. Thirumoolan, S. Ragupathy, S. Renukadevi, P. Rajkumar, Rajakumar S. Rai, R. M. Saravana Kumar, Imran Hasan, Mani Durai, Young-Ho Ahn
Summary: In this study, the photodegradation of brilliant green dye was studied in relation to the comparative photocatalytic activity of pure ZnO and Ni-doped ZnO/CSAC. The Ni-doped ZnO/CSAC showed a higher photocatalytic degradation rate under visible light irradiation, suggesting its potential as an effective wastewater treatment material.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Ajmal Khan, Zhidong Chang, Wenjun Li, Xiaohui Ma, Mei Dong, Liang Geng, Ghulam Yasin, Shuaib Khan, Hira Anwar
Summary: Due to its functional structure and tunable shape, 2D zeolitic imidazole framework (ZIFs) have gained significant interest in various fields. In this study, thin ZIF-8 sheets were prepared using a mixed solvent and then delaminated into single layers through physical sonication. These hexagonal sheets exhibited high stability and controlled morphology, and showed excellent performance in dye degradation compared to 3D ZIF-8 crystals.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Vitaly A. Podshibyakin, Evgenii N. Shepelenko, Leonid D. Popov, Tatyana M. Valova, Anton O. Ayt, Lyudmila G. Kuzmina, Anton V. Lisovin, Oleg N. Burov, Mikhail E. Kletskii, Alexander D. Dubonosov, Vladimir A. Bren
Summary: Bifunctional hybrids containing photochromic indolyl(thienyl) diarylethenes and an ionochromic rhodamine moiety connected by a dimethylene spacer were synthesized. These hybrids exhibit absorption at 450-455 nm and fluorescence at 560 nm in toluene. UV light triggers ring-closed non-fluorescent diarylethene formation, which can be reversed under visible light or in the dark. In the presence of H+ cation, a naked eye effect is observed with the opening of the rhodamine-spirolactam ring and a pink-crimson coloration at 561 nm accompanied by intense long-wavelength emission at 586 nm. This process is reversible by exposure to triethylamine, as confirmed by NMR experiments. The light-induced isomerizations and proton-induced transformations were explained using computational methods. Reversible switching of fluorescent properties can be achieved by light irradiation and proton.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Majid Sharifi-Rad, Hazem S. Elshafie, Pawel Pohl
Summary: The study investigated the synthesis of silver nanoparticles using Lallemantia royleana leaf extract, characterized their physico-chemical properties, and evaluated their biopharmaceutical and catalytic applications. The synthesized nanoparticles showed good stability and exhibited higher antioxidant, antimicrobial, anti-inflammatory, anti-arthritic, and cytotoxic activities compared to the leaf extract. These results provide a promising green synthesis route for silver nanoparticles with potential biomedical and catalytic applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Meera Moydeen Abdul Hameed, Badr M. Thamer
Summary: Security encoding using photochromism is an effective method for creating authentication substrates. A unique photochromic ink has been developed that emits light continuously under UV rays and darkness. The ink is produced by dispersing lanthanidedoped aluminate nanoparticles in a polymer binder. The resulting composite ink can be used to create transparent films on paper, and the stamped patterns become visible under UV rays, changing from colorless to green.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Monika Lamoria, Rita Kakkar, Marilyn Daisy Milton
Summary: Four novel water-soluble benzimidazolium and bis-benzimidazolium salts with a fluorophore-spacer-receptor design were synthesized and demonstrated to selectively detect Fe3+ ions with large Stokes shifts. The binding mechanism and detection performance were investigated through theoretical and experimental studies.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
