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Karawek A, Mayurachayakul P, Santiwat T, Sukwattanasinitt M, Niamnont N. Electrospun nanofibrous sheet doped with a novel triphenylamine based salicylaldehyde fluorophore for hydrazine vapor detection. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ghanavatkar CW, Mishra VR, Sharma S, Mathew E, Chitrambalam S, Joe IH, Nethi SN. Red Emitting Hydroxybenzazole (HBX) Based Azo Dyes: Linear and Non Linear Optical Properties, Optical Limiting, Z Scan Analysis with DFT Assessments. J Fluoresc 2020; 30:335-346. [PMID: 32026240 DOI: 10.1007/s10895-020-02493-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/20/2020] [Indexed: 11/26/2022]
Abstract
Herein, we report the hydroxybenzazole (HBX) containing azo dyes for "linear and non-linear optical" (NLO) applications. These bi-heterocyclic dyes have HBX scaffold (decorated with ESIPT core) and connected to another thiazole moietiy through azo bond. In DMF and DMSO, dyes are "emissive in yellow-red region" and "large Stokes shift" in the range of 62-121 nm were observed. "Nonlinear absorptive coefficient" (β), "nonlinear refractive index" (ƞ2), "third order non-linear optical susceptibility" (χ3) in DMSO, ethanol and methanol were calculated using simple and effective "Z-scan technique" having "Nd: YAG laser" at 532 nm wavelength. 4.46 × 10-13 (e.s.u.) was the highest (χ3) was observed in DMSO among all the dyes. Optical Limiting (OL) values are in the range of 7.61-19.06 J cm-2 in solvents. Thermo Gravimetric Analysis (TGA) supports that, these compounds are useful for numerous high-temperature practices in the construction of electronic as well as optical devices. Band gap was calculated by CV as well as by DFT in acetonitrile. The same trend was observed when these HOMO-LUMO gaps were correlated in between CV and DFT. To gain more insights into structural parameters, molecular geometries were optimized at "B3LYP-6-311 + G (d,p)" level of theory. Further, "Molecular Electrostatic Potential" (MEP), "Frontier Molecular Orbitals" (FMO) were presented using "Density Functional Theory (DFT)". Global hybrid functional (B3LYP, BHandHLYP) and range separated hybrid functionals (RSH) i.e. CAM-B3LYP, ωB97, ωB97X, and ωB97XD were used to calculate linear and NLO properties. Graphical Abstract.
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Affiliation(s)
- Chaitannya W Ghanavatkar
- Department of Dyestuff Technology, Institute of Chemical Technology, Matunga (E), Mumbai, Maharashtra, PIN: 400 019, India
| | - Virendra R Mishra
- Department of Dyestuff Technology, Institute of Chemical Technology, Matunga (E), Mumbai, Maharashtra, PIN: 400 019, India
| | - Suryapratap Sharma
- Department of Dyestuff Technology, Institute of Chemical Technology, Matunga (E), Mumbai, Maharashtra, PIN: 400 019, India
| | - Elizabeth Mathew
- Centre for Molecular and Biophysics Research, Department of Physics, Mar Ivanios College, Thiruvananthapuram, Kerala, 695015, India
| | - Subramaniyan Chitrambalam
- Centre for Molecular and Biophysics Research, Department of Physics, Mar Ivanios College, Thiruvananthapuram, Kerala, 695015, India
| | - Isaac H Joe
- Centre for Molecular and Biophysics Research, Department of Physics, Mar Ivanios College, Thiruvananthapuram, Kerala, 695015, India
| | - Sekar Nagaiyan Nethi
- Department of Dyestuff Technology, Institute of Chemical Technology, Matunga (E), Mumbai, Maharashtra, PIN: 400 019, India.
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Bhalekar SB, Kothavale S, Sekar N. Coumarin and Hydroxyl Decorated Viscosity Sensitive Triphenylamine Derivatives: Synthesis, Photophysical Properties, Viscosity Sensitivity, TD‐DFT, and NLO Properties. ChemistrySelect 2019. [DOI: 10.1002/slct.201903247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sulochana B. Bhalekar
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
| | - Shantaram Kothavale
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
| | - Nagaiyan Sekar
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
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Kundu A, Karthikeyan S, Sagara Y, Moon D, Anthony SP. Temperature-Controlled Locally Excited and Twisted Intramolecular Charge-Transfer State-Dependent Fluorescence Switching in Triphenylamine-Benzothiazole Derivatives. ACS OMEGA 2019; 4:5147-5154. [PMID: 31459690 PMCID: PMC6648163 DOI: 10.1021/acsomega.8b03099] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/28/2019] [Indexed: 06/10/2023]
Abstract
Triphenylamine-benzothiazole derivatives, N-(4-(benzo[d]thiazol-2-yl)phenyl)-N-phenylbenzenamine (1), N-(4-(benzo[d]thiazol-2-yl)-3-methoxyphenyl)-N-phenylbenzenamine (2), and 2-(benzo[d]thiazol-2-yl)-5-(diphenylamino)phenol (3), showed unusual temperature-controlled locally excited (LE) and twisted intramolecular charge-transfer (TICT) state fluorescence switching in polar solvents. The detailed photophysical studies (absorption, fluorescence, lifetime, and quantum yield) in various solvents confirmed polarity-dependent LE and TICT state formation and fluorescence tuning. 1 and 2 exhibited strong fluorescence with short lifetime in nonpolar solvents compared to polar solvents. 1, 2, and 3 in dimethylformamide (DMF) at room temperature showed low-energy weak TICT state fluorescence, whereas high-energy strong LE state fluorescence was observed at -196 °C. Interestingly, further increasing the temperature from 20 to 100 °C, the DMF solution of 1 and 2 exhibited rare fluorescence enhancement with a slight blue shift of λmax via activating more vibrational bands of the TICT state. Thus, 1 and 2 showed weak TICT state fluorescence at room temperature, strong LE state fluorescence at -196 °C, and activation of TICT state at 100 °C. Moreover, molecular conformation and aggregation in the solid state influenced strongly on the fluorescence properties of 1, 2, and 3. Solid-state fluorescence and pH-responsive imidazole nitrogen have been exploited for demonstrating halochromism-induced fluorescence switching. Computational studies provided further insights into the fluorescence tuning and switching. The present studies provide understanding and opportunity to make use of D-A organic molecules in the LE and TICT states for achieving fluorescence switching and tuning.
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Affiliation(s)
- Anu Kundu
- School
of Chemical & Biotechnology, SASTRA
Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Subramanian Karthikeyan
- PG
and Research Department of Chemistry, Khadir
Mohideen College, Adirampattinam, Tamil Nadu 614701, India
| | - Yoshimitsu Sagara
- Research
Institute for Electronic Science, Hokkaido
University, N20, W10, Kita-Ku, Sapporo 001-0020, Japan
| | - Dohyun Moon
- Beamline
Department, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Gyeongbuk, Korea
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Patil DS, Avhad KC, Kadam MM, Sekar N. Synthesis of red emitting triphenylamine derived NLOphoric D–π–A molecules: photophysical, and viscosity sensing studies. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0268-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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