A5034594946- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Luminescence and Fluorescent Materials
- Photochromic and Fluorescence Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Chemical Synthesis and Analysis
- Asymmetric Synthesis and Catalysis
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- Molecular Sensors and Ion Detection
- Molecular Junctions and Nanostructures
- Microwave-Assisted Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Chemical Reaction Mechanisms
- Organic Chemistry Cycloaddition Reactions
- Advanced biosensing and bioanalysis techniques
- Carbohydrate Chemistry and Synthesis
- Analytical Chemistry and Chromatography
- Sulfur-Based Synthesis Techniques
- Quantum Dots Synthesis And Properties
- Electrochemical Analysis and Applications
- Surface Chemistry and Catalysis
- Supramolecular Self-Assembly in Materials
Madurai Kamaraj University
2014-2024
National Central University
2021-2023
Indian Institute of Technology Roorkee
2019-2020
Madurai Medical College
2015-2016
A new set of pyrrolopyrrole-based (PPr) polymers incorporated with thioalkylated/alkylated bithiophene (SBT/BT) is synthesized and explored as hole-transporting materials (HTMs) for Sn-based perovskite solar cells (TPSCs). Three bithiophenyl spacers bearing the thioalkylated hexyl (SBT-6), tetradecyl (SBT-14), (BT-14) chains are utilized to examine effect alkyl chain lengths. Among them, TPSCs fabricated using PPr-SBT-14 HTMs through a two-step approach by attaining power conversion...
Abstract A new series of triphenylamine (TPA)‐functionalized isomeric polythiophenes are developed as hole transporting materials (HTM) for inverted tin‐based perovskite solar cells (TPSCs). Bithiophene (BT) is first functionalized with two TPA (electron donor; D) at 3 and 5 positions to give structural compounds (3BT2D 5BT2D). The BT2Ds then coupled 3,3′‐bis(tetradecylthio)‐2,2′‐bithiophene (SBT‐14)/3,3′‐ditetradecyl‐2,2′‐bithiophene (BT‐14) produce (1‐4), which compared conventional poly[...
Abstract A series of linear, V‐shaped and branched triphenylamine/tris(biphenyl)amine‐based derivatives with electron‐withdrawing cyanovinyl‐ phenyl‐substituted conjugated branches containing either electron‐donating OMe or CN end groups have been synthesized. UV/vis absorption fluorescence emission data illustrates that introduction the electron‐donor/acceptor induces intramolecular charge transfer leads to a shift onset toward longer wavelengths. Addition large amounts water solutions...
2,2,7,7-tetrakis(N,N-dip-methoxyphenylamine)-9,9-spirobifluorene (spiro-OMeTAD) is a popular hole-transporting material (HTM) in perovskite solar cells (PSCs), However, it suffers from high-cost and stability issues, which need to be overcome for PSC commercialization. Here, we report isomers of bithiophene-based HTMs functionalized with triarylamine imidazole PSCs. The planar 3-ImBT-2D (1) exhibits higher hole mobility than 5-ImBT-2D (2) via modulation donor-group positions. PSCs using HTM...
Abstract In the present work, microporous nitrogen containing covalent triazine polymers (CTPs) TATAM was synthesized from condensation of 4,4′4′′‐(1,3,5‐triazine‐2,4,6‐triyl) tribenzaldehyde (TATA) and melamine under solvothermal conditions to obtain nitrogen‐ rich polymeric supported materials (TATAM). Further, palladium nanoparticles (Pd NPs) were on networks (Pd@TATAM). The Pd@TATAM CTPs material thoroughly characterized by FT‐IR, UV‐DRS, solid state 13 C‐CPMAS, XPS, powder X‐ray...
Abstract Imine‐based microporous covalent organic frameworks, TATAE were synthesized from condensation of 4,4′,4“‐(1,3,5‐triazine‐2,4,6‐triyl)tribenzaldehyde and 1,4‐diaminobenzene, followed by Pd(OAc) 2 was incorporated on (Pd/TATAE). The as‐synthesized Pd/TATAE thoroughly characterized Fourier Transform‐Infrared Spectroscopy, 13 C CP‐MAS solid state nuclear magnetic resonance, powder X‐ray diffraction, photoelectron spectroscopy, thermo gravimetric analysis, scanning electron microscopy...
Novel triphenylamine-based star-like molecules were synthesized and their photophysical properties in different solvents have been investigated.
Triarylamine end-capped-functionalized arylene-imidazole derivatives were synthesized from readily accessible, inexpensive precursors and employed as hole transporting materials (HTMs) in perovskite solar cells (PSCs). All the HTMs displayed high thermal decomposition temperatures (>410 °C), which is beneficial for realizing stable PSC devices. In addition, new show appropriate energy level alignment with layer, ensuring efficient transfer perovskites to HTMs. Interestingly, PSCs fabricated...
A series of long alkyl chain substituted linear and branched conjugated anthracene derivatives have aggregation-induced emission properties also show PFC behavior, which can be useful for optoelectronic applications.
Highly enantioselective Michael addition reactions of diethyl malonate to various chalcones have been achieved under mild chiral multisite phase-transfer reaction conditions by the successful utilization 2,4,6-(triscinchoniummethyl)phenyl-1,3,5-triazines as new quaternary ammonium catalysts. This simple asymmetric process was found be quite effective and obtain adducts with very good yields enantiomeric excesses.
New types of mesitylene based tri-site containing asymmetric quaternary ammonium salts <bold>9</bold> (<bold>9a</bold> and <bold>9b</bold>) were synthesized their catalytic activities studied using Michael addition reactions with various chalcones diethylmalonate under mild basic conditions very good yields ee's.
Molecules with a fused pyrrole and thiophene backbone can be harnessed into organic semiconductors optoelectronics devices. Closely related to these applications is contact frequently used gold electrode. This organic/metal interface has been examined scanning tunneling microscopy (STM) at the molecular level, revealing adsorption orientation spatial structure of Au(111) The current study focused on 1,4-bis(4H-dithieno[3,2-b:2′,3′-d]pyrrol-4-yl)benzene (BDTP) an ordered BDTP adlayer was...
We synthesized a new series of intramolecular charge transfer (ICT) molecules by attaching very strong electron-withdrawing groups to triphenylamine backbone. ICT interactions can be found for all the (TPA) derivatives due electron withdrawing properties cyanide on end terminal moiety. When introducing group TPA moiety giving rise efficient emission tuning from blue green in polar solvents, increase which results bathochromically shifted band observed. Further, these results, we that...
The study of molecular adsorption at an ordered metallic electrode can yield a fundamental understanding the chemical bonding electrified interface. current explored cytosine (C) on Au(111) in neutral media phosphate buffer solution (PBS), KClO4, and K2SO4, as sequel to our previous work conducted acids (Electrochim. Acta, 2021, 390, 138871). state C was characterized by voltammetry scanning tunneling microscopy, showing that admolecules transformed from physisorbed chemisorbed potential...
Abstract The synthesis of the catalysts (I) is described.
Abstract Two new multi‐site phase transfer catalysts are introduced for the enantioselective Michael addition reactions of various chalcones with diethyl malonate.
The isomers of bithiophene-based hole transporting materials (HTM) functionalized with triarylamine and imidazole were employed for perovskite solar cells (PSCs). planar 3-ImBT-2D (1) exhibits higher mobility than 5-ImBT-2D (2) which attributes to the unbalanced charge distribution at both ends thiophene. PSCs using HTM (1), delivers excellent power conversion efficiency (PCE) 21.73% Li-TFSI doping, 17.79% dopant-free. In addition, PCE Li-TFSI-free devices by surface modification yields a...