Article
Engineering, Environmental
Frank Leresche, Elena A. Vialykh, Fernando L. Rosario-Ortiz
Summary: This study calculated the UV-vis spectra of DOM model compounds using time-dependent density functional theory and successfully re-created the exponential shape of DOM absorption spectra by summing individual spectra. The effects of borohydride reduction on DOM absorbance spectra were accurately predicted, with a larger decrease in absorbance at longer wavelengths. Additionally, intra-molecular charge-transfer interactions were found to contribute to DOM absorption, while inter-molecular interactions were deemed less likely to play a role.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Lu Wang, Yukai Zhang, Peng Zhang, Dianzhong Wen
Summary: This paper presents the fabrication of a physically transient resistive random-access memory (RRAM) device using a composite material of egg protein and graphene quantum dots. The device exhibits good memory characteristics and biodegradability, making it a promising candidate for transient electronic systems.
Article
Chemistry, Multidisciplinary
Jaeyoul Kim, Donghyo Hahm, Wan Ki Bae, Hyunho Lee, Jeonghun Kwak
Summary: This study analyzes the transient electroluminescence signals of dichromatic QLEDs and provides insights into the operation mechanisms such as charge injection, exciton recombination, and electron mobility. Additionally, it quantitatively measures the effects of Förster resonant energy transfer and exciton quenching in QLED operation.
Article
Chemistry, Physical
Jiahao Lai, Xinyu Jiang, Min Zhao, Shihai Cui, Jing Yang, Yafei Li
Summary: In this study, a thickness-dependent BiOIO3 loaded by carbon quantum dots (CQDs/BiOIO3) was synthesized, showing high efficiency in the photodegradation of bisphenol A. The efficient separation of photogenic charges and the enhancement of charge transfer and light absorption were identified as the key factors contributing to the outstanding photocatalytic activity. The dominant active species and degradation pathways were studied, providing insights for the design of high-performance catalysts based on layered bismuth-based materials.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Susmita Maiti, Sudip Karmakar, Somashree Kundu, Chandra Nath Roy, Tushar Kanti Das, Brahmananda Chakraborty, Abhijit Saha
Summary: The integration of biologically important molecules with graphene quantum dots (GQDs) has attracted considerable attention due to their promising biomedical applications. This study investigates the adsorption of DNA on GQDs by analyzing binding thermodynamics, conducting density functional theoretical (DFT) simulations, and evaluating photophysical parameters. The results demonstrate the significant role of sugar residue in the interaction between nucleic acids and GQDs, and provide insights into the adsorption mechanism. The findings contribute to the understanding of GQDs' potential role in cellular imaging, biosensing, and targeted drug delivery.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Spectroscopy
Ruixiang Wu, Xin Liu, Xiaoshuai Wang, Fengjie Guo, Shengzhi Wang, Bin Li, Liu-Yong Cheng, Xiangyang Miao
Summary: The fluorescence quenching due to energy transfer from InP/ZnS quantum dots to Ti3C2Tx MXene materials was investigated using transient absorption spectroscopy. It was found that the photo-induced absorption feature in the transient spectrum showed a blue-shift during the fluorescence quenching, indicating an increase in photon energy required for the upward transition. The lifetime of stimulated emission was also found to increase with increasing Ti3C2Tx MXene. By analyzing the lifetime of the stimulated emission feature, the fluorescence quenching of QDs can be quantitatively characterized and Ti3C2Tx MXene can be detected with high sensitivity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Chemistry, Physical
Sudhakar Narra, Sumit S. Bhosale, Aparna K. Kharade, Sue-min Chang, Eric Wei-Guang Diau
Summary: Femtosecond transient absorption spectral investigations were conducted to understand carrier relaxation mechanism in perovskite nanocrystals. The study found that Cs(1-x)FA(x)PbBr(3) (CF) samples exhibited slower charge recombination rates compared to CsPbBr3 (CS) samples, consistent with their photocatalytic performances.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jiawen Wu, Fangfang Wang, Xinting Zhao, Baohua Zhu, Yuzong Gu
Summary: High-quality alpha-FeOOH nanorods/reduced graphene oxide (RGO) composites were successfully prepared and characterized. The composites exhibited enhanced third-order nonlinear optical properties, showing potential applications in NLO devices.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Xian Wei, Qi Zhang, Zhongjie Cui, Dan Yang, Shiliang Mei, Wanlu Zhang, Haijiao Xie, Kehan Yu, Ruiqian Guo, Wei Wei
Summary: Understanding the electronic structure of doped InP quantum dots is crucial for optimizing the material for specific applications. This study combines experimental and computational approaches to investigate the doping mechanism and surface passivation of InP QDs. The results provide insights into the microscopic details of doped InP and offer the potential for precise control of guest ion stoichiometry for optimized electrical devices.
INORGANIC CHEMISTRY
(2023)
Article
Optics
Huiqi Zhang, Gang Wang, Zhiming Zhang, Josh Haipeng Lei, Tzu-Ming Liu, Guichuan Xing, Chu-Xia Deng, Zikang Tang, Songnan Qu
Summary: Efficient red emissive carbon dots (CDs) were synthesized using a one-step solvothermal treatment. The CDs exhibited high photoluminescence quantum yield and multi-photon fluorescence. Composing the CDs with BSA led to enhanced red fluorescence and particle size, enabling in vivo tumor imaging and two-photon fluorescence imaging.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Fengai Zhao, Shuanglin Hu, Canhui Xu, Haiyan Xiao, Xiaosong Zhou, Xiaotao Zu, Shuming Peng
Summary: This study used density functional theory calculations to investigate the photophysical properties of Cu-doped CdSe QDs, revealing that the oxidation state of Cu in different locations can lead to distinct effects on optical absorption. The results suggest that doping Cu impurity in CdSe QDs can be utilized to achieve special photophysical properties for high-efficiency photovoltaic devices, with potential applications to other II-VI semiconductor QDs incorporating transition-metal ions with variable valence.
Article
Chemistry, Physical
Qi Hu, Yi Fang, Zhao Du, Zhonglu Guo, Zhenya Liu, Yang Huang, Jing Lin, Chengchun Tang
Summary: This study successfully prepared GQDs/BNNs composites with excellent microwave absorption properties, and discussed the relationship between microwave absorption performance and the concentration of GQDs in the composites. The results showed that GQDs/BNNs had strong absorption capabilities.
Article
Optics
Pengfei Li, Shanshan Xue, Lu Sun, Xupeng Zong, Li An, Dan Qu, Xiayan Wang, Zaicheng Sun
Summary: Carbon dots (CDs) as an advanced fluorescent carbon nanomaterial have great potential, but the complexity of their PL mechanism and structure-function relationship poses major challenges to their development and applications. This study synthesized red emissive CDs and found that their PL mechanism is similar to DHQP, providing insights for the further development of tunable CDs.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Engineering, Environmental
Xin Gao, Juan Chen, Huinan Che, Yanhui Ao, Peifang Wang
Summary: This study successfully constructed a La2Ti2O7/g-C3N4/AgI photocatalyst with separated heterojunctions, providing more charge transfer channels and reaction sites, leading to significantly enhanced photodegradation performance for sulfamethoxazole. The study also identified the vulnerable atoms and main degradation pathways of SMZ, offering new insights for the rational design/development of multicomponent photocatalysts for treating emerging pollutants in waters.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Zahra Barani, Tekwam Geremew, Megan Stokey, Nicholas Sesing, Maedeh Taheri, Matthew J. Hilfiker, Fariborz Kargar, Mathias Schubert, Tina T. Salguero, Alexander A. Balandin
Summary: This study demonstrates a unique class of quantum composites based on polymers with fillers composed of a van der Waals quantum material. These composites reveal multiple charge-density-wave quantum condensate phases. Typically, materials exhibiting quantum phenomena are crystalline, pure, and have few defects. However, in this research, the macroscopic charge-density-wave phases of the filler particles are successfully preserved even after multiple composite processing steps. The prepared composites display strong charge-density-wave phenomena at temperatures even above room temperature and show potential for advanced applications in energy storage and electronics.
ADVANCED MATERIALS
(2023)
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)