Review
Chemistry, Inorganic & Nuclear
Waqas Ahmad, Jingjing Wang, Huanhuan Li, Qin Ouyang, Wanhua Wu, Quansheng Chen
Summary: This review article summarizes the latest advances in triplet-triplet annihilation upconversion (TTA-UC), covering aspects such as substrate patterns, excited-state engineering, and potential applications, aiming to extend the research scope of this technology.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Biochemistry & Molecular Biology
Min Gao, Le Zeng, Linhan Jiang, Mingyu Zhang, Yong Chen, Ling Huang
Summary: In this study, a Bodipy dimer with large Stokes shifts was synthesized, and it was found that it can enhance the upconversion efficiency of TTA-UC when coupled with the photosensitizer PdTPBP. This research provides a new strategy to improve the performance of TTA-UC by expanding Bodipy Stokes shifts.
Article
Materials Science, Multidisciplinary
Shaorui Li, Yuanmeng Zhao, Quan Li, Menglian Li, Xu Zhang, Hai-Bing Xu
Summary: Molecular motors, based on overcrowded alkenes serving as ligands, can be utilized to synthesize lanthanide-functionalized water-soluble ionic compounds. These compounds exhibit photochemical isomerization and energy transfer from ligands to lanthanide ions under visible light irradiation, leading to decreased absorption intensity and enhanced luminescence. The movement of the motors can be traced using time-resolved luminescence, and their luminescence can potentially be used as a thermometer. Furthermore, intramolecular energy transfer and stator contraction play synergistic roles in regulating the rotary motion of lanthanide-complexed motors.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yeonju Jeong, Kyo Min Hwang, Jae Hee Lee, Min Jeong Kwon, Taekyung Kim, Wan Pyo Hong
Summary: Two deep-blue fluorescent emitters, ATPNF-1 and ATPNF-2, were synthesized by incorporating a naphthobenzofurocarbazole unit in different positions of the anthracene core. These emitters served as host materials for the t-DABNA dopant and exhibited high efficiency in OLED devices, with maximum external quantum efficiencies of 7.0% and 8.0% respectively. The efficient performance can be attributed to the TTF-mediated high-lying reverse intersystem crossing process, proving the potential of this blue-material design strategy for developing efficient OLED devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Jincheng Zhang, Huatian Duan, Ying Hong, Jingyu Deng, Li-Juan Fan
Summary: A series of cationic conjugated polymers were synthesized for the detection of ATP, and the fluorescence of the polymers was quenched upon adding ATP. The sensitivity of the polymer to ATP increased with the density of the quaternary ammonium group. The study provides a general strategy for designing sensing systems for biomolecules with complex structures.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Optics
Ronghua Shen, Ying Qian
Summary: A water-soluble photo-induced NO donor CNA-NO was developed to increase the local concentration of nitric oxide in the human body, with a high nitric oxide releasing yield of 58.6%. The release of nitric oxide from CNA-NO was accurately monitored and controlled through enhanced fluorescence signals, showing good control under various pH conditions during a release time of 40 minutes.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Brett Yurash, Alana Dixon, Carolina Espinoza, Alexander Mikhailovsky, Sangmin Chae, Hajime Nakanotani, Chihaya Adachi, Thuc-Quyen Nguyen
Summary: Research in photon upconversion focuses on improving efficiency, performance, and reducing production costs. Studies utilizing TADF sensitizers have gained interest, and for the first time, ternary photon upconversion strategy with TADF sensitizer 4CzIPN has successfully doubled the upconversion quantum yield.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bolong Zhang, Kieran D. Richards, Beatrice E. Jones, Abigail R. Collins, Rosie Sanders, Sarah R. Needham, Pu Qian, Amoghavarsha Mahadevegowda, Caterina Ducati, Stanley W. Botchway, Rachel C. Evans
Summary: This study demonstrates the first example of triplet-triplet annihilation upconversion (TTA-UC) based lifetime imaging microscopy. Ultra-small nanoparticle (NP) probes were used to overcome background autofluorescence and achieve excellent image contrast and oxygen mapping in living cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Ashish Chanana, Hugo Larocque, Renan Moreira, Jacques Carolan, Biswarup Guha, Emerson G. Melo, Vikas Anant, Jindong Song, Dirk Englund, Daniel J. Blumenthal, Kartik Srinivasan, Marcelo Davanco
Summary: Researchers have successfully integrated a quantum emitter single-photon source with an ultra-low loss silicon nitride photonic circuit, demonstrating triggered and pure single-photon emission. This advancement is a step forward in the development of scaled chip-integrated photonic quantum information systems.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Vanessa Michaud, Jonas Pracht, Fabian Schilfarth, Cornelia Damm, Benedikt Platzer, Philipp Haines, Christina Harreiss, Dirk M. Guldi, Erdmann Spiecker, Wolfgang Peukert
Summary: Carbon dots (CDs) are highly fluorescent materials used in bioimaging, sensors, and luminescent displays. This study successfully separated all components of CDs by two-step gradient chromatography, showing that amorphous and crystalline CDs coexist in the same suspension. High performance liquid chromatography (HPLC) was used to further improve purification efficiency and automate the process, achieving separation of up to six components.
Article
Biochemistry & Molecular Biology
Anam Fatima, Jad Rabah, Emmanuel Allard, Helene Fensterbank, Karen Wright, Gotard Burdzinski, Gilles Clavier, Michel Sliwa, Thomas Pino, Rachel Meallet-Renault, Karine Steenkeste, Minh-Huong Ha-Thi
Summary: This study presents the photophysical studies on a BODIPY-fullerene-distyryl BODIPY triad and its reference dyads. The association of the two chromophore units linked by a fullerene moiety leads to strong light absorption and the formation of triplet-excited states. The lifetime and formation quantum yield of the triplet-excited states are investigated, and triplet-triplet annihilation up-conversion is characterized.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Drake Beery, Timothy W. Schmidt, Kenneth Hanson
Summary: Utilizing molecular photon upconversion via triplet-triplet annihilation in solar cells has the potential to surpass the Shockley-Queisser limit, but further research and optimization in areas such as red-shifting absorption, photon management, etc., are needed.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xiaoyun Chai, Weiwei Zhu, Qingguo Meng, Ting Wang
Summary: The Si-substituted rhodamine-based water-soluble fluorescent probe designed for Cu+ fluorescence imaging shows substantial affinity and selectivity. The probe exhibits outstanding water-solubility and ultrahigh sensitivity to Cu+ in physiological conditions, ensuring reliable fluorescence imaging in vivo.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Guanheng Huang, Jiayu Li, Ziqi Deng, Jinghong Li, Shanshan Sun, Liang Xu, Li Dang, Ming-De Li
Summary: The study demonstrates the generation of a stable dianion biradical through noncovalent interactions, which has the potential to serve as a photosensitizer under visible and NIR light excitation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Hideo Takakura, Yuto Goto, Akira Kitamura, Toshitada Yoshihara, Seiji Tobita, Masataka Kinjo, Mikako Ogawa
Summary: In this study, the intersystem crossing quantum yield (Phi(ISC)) of a silicon phthalocyanine derivatized from IRDye700DX (IR700) was evaluated using fluorescence correlation spectroscopy (FCS). The calculated Phi(ISC) was 0.019 +/- 0.002, and the FCS measurement was validated through experiments with potassium iodide.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Analytical
Mbulelo Jokazi, Lekhetho S. Mpeta, Tebello Nyokong
Summary: Manganese and cobalt metalated porphyrins attached to graphene quantum dots showed improved electrocatalytic activity for the oxidation of hydrazine, with CoTA(3)CPP-GQDs exhibiting the best catalytic rate constants and lowest limits of detection.
Article
Biochemistry & Molecular Biology
Pinar Sen, Azole Sindelo, Nnaemeka Nnaji, John Mack, Tebello Nyokong
Summary: Novel mono- and dipyridylvinyl boron dipyrromethene dyes were prepared and compared to the corresponding core dyes for their photodynamic antimicrobial chemotherapy (PACT) activities. Results showed that the spectral properties of the dyes and the generation of singlet oxygen could be controlled through pyridylvinyl substitution and iodine atom incorporation, but the pi-extended dyes had lower activities compared to the core dye.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Oncology
Yolande Ikala Openda, Tebello Nyokong
Summary: Photodynamic antimicrobial chemotherapy (PACT) combined with ciprofloxacin (CIP) effectively reduces the biofilm cell survival of antibiotic-resistant S. aureus and E. coli strains. PACT alone shows no significant activity, while CIP alone exhibits some inhibitory activity. The combination treatment completely eradicates mature biofilms.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Biochemistry & Molecular Biology
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study investigates the effects of ultrasonic frequency and power on the stability, reactive oxygen species yields, and cytotoxicity activities of different substituted ionic phthalocyanines (Pcs) in sonodynamic therapy (SDT). The degradation of Pcs increases with increasing power at Par II. Two reactive oxygen species, singlet oxygen and hydroxyl radicals, were detected in ultrasound treated Pcs. Par I was chosen for SDT, photodynamic therapy (PDT), and photo-sonodynamic therapy (PSDT) due to minimal degradation of most Pcs. PSDT generally shows improved therapeutic efficacies compared to SDT and PDT mono treatments.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Nnamdi Nwahara, Garth Abrahams, John Mack, Earl Prinsloo, Tebello Nyokong
Summary: This study presents a liposome loaded-silicon (IV) phthalocyanine (SiPc) with naphthoquinone axial ligands as hypoxia-responsive prodrug-like moieties (Prodrug-SiPc). Computational methods were used to assess the photophysical, photochemical and electrochemical redox properties of Prodrug-SiPc, revealing the relationship between material structure and properties. The liposomal encapsulation of Prodrug-SiPc resulted in potential photodynamic therapy (PDT) drug candidates, which took advantage of the hypoxic microenvironment of tumors to enhance therapeutic efficacy compared to typical PDT.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Physical
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study explores the effects of gold and silver nanoparticles on the in vitro anticancer photo and sono-dynamic therapy and their combination therapy using cationic thiazole-phthalocyanines. The results show that conjugation to nanoparticles increases the generation of oxygen species and the combination therapy exhibits higher anticancer activity compared to monotherapies.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Gugu Kubheka, Nthabeleng Molupe, John Mack, Tebello Nyokong
Summary: The ease of functionalization of BODIPY dyes allows for the preparation of pH indicators by introducing suitable functional groups. In this study, two dimethylamino substituted BODIPY dyes were synthesized and characterized, and their photophysical properties and pH response were investigated.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Analytical
Gugu Kubheka, Estela Climent, Charlie Tobias, Knut Rurack, John Mack, Tebello Nyokong
Summary: This study used azaBODIPY dyes doped into polystyrene particles as optical probes for the detection of high-risk HPV types. The particles were successfully attached with HPV DNA single strands, and demonstrated low detection limits and a narrow detection range for HPV11. The results suggest that these particles have the potential for multiplex assays and further study.
Article
Chemistry, Applied
Chenming Chan, Jia Li, Jianwei Wu, Youchun Zi, Zhaoli Xue, Mahlatse Ledwaba, John Mack, Tebello Nyokong
Summary: Due to the significant hazardous impact of Hg2+ on the environment and ecosystem, there is a need for highly sensitive and selective Hg2+ probes. A new imidazole-based Hg2+ probe has been synthesized and characterized, which can detect Hg2+ through an ion-specific co-ordination mechanism. The probe exhibits significant fluorescence enhancement in acetonitrile solutions containing Hg2+, with a limit of detection of 0.30 mu M. Additionally, it shows utility in detecting Hg2+ in biochemical systems and the environment based on paper test strip and HeLa cell experiments.
Article
Chemistry, Analytical
Lunathi Ncwane, Lekhetho S. Mpeta, Tebello Nyokong
Summary: This study investigates the effect of detonation nanodiamonds (DNDs) on the electrocatalytic properties of an asymmetrically substituted cobalt phthalocyanine (CoPc). The addition of DNDs enhances the electrochemical behavior of CoPc. Various modifications of glassy carbon electrode (GCE) were made using CoPc alone, CoPc-DNDs(pi pi) or CoPc@DNDs, and the sequential addition of CoPc and DNDs. Among these modifications, GCE/CoPc@DNDs showed the best electrocatalytic activity for the detection of hydrazine, with a catalytic rate of 9.3x10(4) M-1.s(-1) and a detection limit of 0.33 mu M.
Article
Polymer Science
James Oyim, Edith Amuhaya, Tebello Nyokong
Summary: Photocatalyst adsorbents based on porphyrin-immobilized activated carbon-decorated polyacrylonitrile (InP(PAN/AC)) were studied for the removal of methylene blue dye and Ciprofloxacin in water. The InP(PAN/AC) demonstrated high removal efficiency and structural integrity after multiple cycles of usage. The study highlights the coordinated contribution of singlet oxygen and hydroxyl radical in the photodegradation process and emphasizes the importance of an integrated system with adsorption and photodegradation capabilities for water treatment.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2023)
Article
Oncology
Azole Sindelo, Pinar Sen, Tebello Nyokong
Summary: Antimicrobial photodynamic inactivation (aPDI) is an effective method for eradicating drug-resistant microorganisms due to its minimal possibility of microbial resistance. This study focuses on the preparation and characterization of novel neutral and cationic morpholine containing Schiff base phthalocyanines. The cationic complexes show promising photodynamic activity against various microorganisms, while the neutral complexes are not suitable for antimicrobial studies. The effectiveness of aPDI is dependent on the concentration and light dose.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Review
Engineering, Marine
Caglar Karatug, Yasin Arslanoglu, C. Guedes Soares
Summary: This study reviews the current status and future trends of maintenance approaches to ship machinery systems. Through a systematic literature review process, relevant literature is identified and examined. Bibliometric analyses are conducted to determine the distribution of papers, top authors, papers, journals, and organisations. The advantages and difficulties of each maintenance strategy are discussed. An effective maintenance policy for new ship concepts is proposed based on the information from the literature. It is believed that condition-based maintenance will be the future trend, supported by reliability and risk approaches.
JOURNAL OF MARINE ENGINEERING AND TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Reitumetse Nkhahle, Nthabeleng Molupe, John Mack, Tebello Nyokong
Summary: This work provides a synthesis method for an unsymmetrically substituted cobalt phthalocyanine and its symmetric counterpart, and applies them in electrocatalysis. The results show that the unsymmetrically substituted cobalt phthalocyanine exhibits superior performance in electrocatalytic reactions. The reactivity of the complexes is further evaluated using theoretical calculations, which indicate that the unsymmetrically substituted compound has higher reactivity.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Sixolile Centane, Sithi Mgidlana, Yolande Openda, Nobuhle Ndebele, Tebello Nyokong
Summary: Surface functionalization plays a crucial role in improving efficiency and selectivity of biosensors. This study explores the use of asymmetric and symmetric cobalt phthalocyanines as biorecognition element immobilization and signal amplification for the electrochemical detection of HER2. The cobalt phthalocyanines were coupled with sulphur nitrogen graphene quantum dots for enhanced performance. The aptasensors demonstrated great potential in monitoring HER2 levels for breast cancer management.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Masoume Malmir, Majid M. Heravi, Zahra Yekke-Ghasemi, Masoud Mirzaei
Summary: In this study, a tri-component composite consisting of Fe3O4 nanoparticles, Keggin-type polyoxometalate, and graphene oxide was prepared and investigated as a catalyst for the oxidation of sulfides to sulfoxides. The catalyst showed excellent stability, high yields, and recyclability, making it a promising choice for organic-inorganic hybrid catalytic reactions conducted under mild conditions.
Article
Chemistry, Inorganic & Nuclear
Samuel D. Juarez-Escamilla, Sriloy Dey, Bruno Donnadieu, T. Keith Hollis
Summary: In this study, a bidentate Mo complex was synthesized using metalation and transmetalation methodology. The synthesis was optimized to achieve a high yield. The crystal structure of the bidentate complex was determined. Additionally, alternative forms of ligands were discovered in the reaction.
Article
Chemistry, Inorganic & Nuclear
Mohamed H. Abdel-Rhman, Ghada Samir, Mostafa A. Hussien, Nasser M. Hosny
Summary: This study investigated the dissolution performance of hydrazine carbonate solution on zirconium dibutyl phosphate (Zr-DBP), and found that hydrazine carbonate solution could promote the dissolution of Zr-DBP. The effects of dissolution temperature and hydrogen peroxide concentration on the dissolution efficiency were also explored, and the corrosion effect on stainless steel by hydrazine carbonate solution was studied.
Article
Chemistry, Inorganic & Nuclear
Qiaofang Fu, Fangyu Tan, Wu Ying
Summary: This study successfully prepared vermiculite/g-C3N4/TiO2 composites and found that under specific conditions, the composites exhibited excellent degradation effects, with a high degradation rate for methylene blue. Additionally, the composites were able to enhance surface area, reduce carrier loading rate, improve light energy utilization, and enhance durability.
Article
Chemistry, Inorganic & Nuclear
Annabelle G. W. Hodson, Robert T. Mason
Summary: Functionalised polystyrene resins have been found to be efficient catalysts in the synthesis of specific complexes, with the conversion rate controlled by the polymer structure. The addition of amines or amino acids can further yield substituted 13-butadienyl complexes, which have been analyzed by NMR.
Article
Chemistry, Inorganic & Nuclear
C. Kavitha, S. Anbarasan, P. Subramaniam
Summary: The sulfoxidation of PMAAs by the oxo(salen)chromium(V) complex in aqueous acetonitrile medium was studied. The rate of the reaction is influenced by the polarity of the medium and the substituents on PMAA, with electron donating substituents accelerating the reaction and electron withdrawing substituents retarding the reaction.
Article
Chemistry, Inorganic & Nuclear
Qiang-Qiang Liu, Mithun Kumar Ghosh, Shu-Lan Cai, Xiao-Hong Liu, Lu Lu, Mohd. Muddassir, Tanmay Kumar Ghorai, Jun Wang
Summary: Three newly developed coordination polymers (CPs) with semiconducting properties were synthesized using hydrothermal methods. These CPs exhibit superior photocatalytic activity and can degrade organic pollutants effectively.
Article
Chemistry, Inorganic & Nuclear
Mehrnaz Aliahmadi, Ali Nemati Kharat, Jan Janczak
Summary: This study proposes a method for synthesizing allyl alcohol using cost-effective and renewable bio-resource glycerol. By utilizing catalysts, alcohol as a solvent, and a reducing agent, allyl alcohol with an efficiency of 100% was obtained. The structures of the newly synthesized complexes were determined using X-ray single crystallography.
Article
Chemistry, Inorganic & Nuclear
Ji-Yan Gao, Nan Zhang, Dong-Sheng Huang, Xiang-Rong Liu, Zai-Wen Yang, Shun-Sheng Zhao
Summary: Two new transition metal complexes I and II were synthesized and characterized. The complexes exhibited strong thermal stabilities and showed effective binding to CT-DNA and BSA. Complex II exhibited stronger inhibition activity against P. aeruginosa than gentamicin sulfate. These complexes have potential applications in drug research.
Article
Chemistry, Inorganic & Nuclear
Rishabh Ujjval, Hilal Ahmad Khan, Chinnappan Sivasankar, Natesan Thirupathi
Summary: In this study, a rigid 2-aminobenzimidazole type guanidine and its platinum complexes were synthesized through a series of reactions and characterized by various physical and chemical methods. The reaction mechanism was also explained through DFT calculations.
Article
Chemistry, Inorganic & Nuclear
Marcelo Carpes Nunes, Thais Zaboenco, Vinicius Kemper Melara, Gabriel Barros Baptistella, Andre Luiz Barboza Formiga, Andersson Barison, Fabio Souza Nunes
Summary: A new luminescent molecular thermometer has been developed, which uses the spin-crossover equilibrium of a nickelcyclen derivative to measure temperature. The sensor shows high sensitivity and accuracy.
Article
Chemistry, Inorganic & Nuclear
Yuyu Shan, Zhenqin Zhao, Xia Zhang, Zhan Wu, Xiu-Ling Li
Summary: In this study, a new bridging ligand was synthesized through refluxing, and two mononuclear Cu(I) complexes and two trinuclear Cu(I)-Eu(III) complexes were obtained through self-assembly. The Cu(I) antenna chromophores successfully transferred energy to the Eu(III) centers, achieving sensitized Eu(III) luminescence.
Article
Chemistry, Inorganic & Nuclear
Gabriela Sanchez-Lecuona, Mayra C. Vazquez-Nunez, Bruno Donnadieu, Miguel A. Munoz-Hernandez, Virginia Montiel-Palma
Summary: The reaction of RuHCl(PPh3)3 with GaMe3 has been studied and the obtained complexes were analyzed in detail. The results indicate the formation of a Ru-Ga bond, suggesting the generation of an in situ formed ambiphilic phosphinogallyl ligand. This is of significance for understanding the interaction between metal-halogen bonds and metal-small molecule bonds.
Article
Chemistry, Inorganic & Nuclear
Sevil Sener, Nursel Acar, Fatih Dumludag
Summary: The synthesis, characterization, spectroscopic and bonding features of a new Co (II) phthalocyanine compound containing two thiocarbohydrazone groups were explained. The compound showed semiconductor properties and potential as a temperature sensor.
Article
Chemistry, Inorganic & Nuclear
Ledja B. O. Davi, Aryanna S. P. N. Costa, Mariana S. Silva, Adriana S. Ribeiro, Cintya D. A. E. S. Barbosa, Julio C. S. Da Silva, Dimas J. P. Lima, Daniela S. Anunciacao
Summary: In this study, a dansyl derivative sensor called o-PDDS was prepared and used for the detection of Al3+ ions in water. The o-PDDS sensor exhibited high sensitivity and linear response towards Al3+ ions. Experimental and computational studies confirmed a 1:1 stoichiometry ratio between o-PDDS and Al3+ ions. Real sample analysis demonstrated the selectivity and detection performance of the sensor, indicating its potential for field use.
