A comparative study on photophysics of meso-substituted mono- and bis-BODIPY carbazoles

Anjana, E.; Chavda, Jaydeepsinh; Gupta, Iti; Mishra, Ashok Kumar

doi:10.1016/j.jphotochem.2022.114356

Cited by 7 publications

(1 citation statement)

References 38 publications

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“…[ 13 ] Usually, optical materials which are used to determine temperature variations, are based on edge absorption shift, [ 14 ] refractive index change, [ 15 ] or maximum emission wavelength intensity under temperature changes. [ 16 ] Examples of the first category include Fabry–Pérot interferometers (resonators), [ 17 ] extrinsic Fabry–Pérot interferences, [ 18 ] fiber Sagnac interferometers, [ 19 ] Mach–Zehnder interferometers, [ 20 ] optical fiber interferometric sensors, [ 21 ] fiber grating sensors, [ 22 ] long‐period fiber gratings, [ 23 ] surface plasmon resonance sensors, [ 24 ] silicon‐on‐insulator sensors, [ 25 ] and thermochromic materials. [ 26 ] Temperature‐dependent fluorescent materials are also categorized into two types: transition‐metal inorganic chromophores, such as Europium, [ 27 ] and organic molecules such as organic polymers [ 28 ] and COFs.…”

Section: Introductionmentioning

confidence: 99%

Pyrene‐Based Polyimide Covalent Organic Framework with Temperature‐Dependent Fluorescence

Zadehnazari

Khosropour

Altaf

et al. 2023

Advanced Optical Materials

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The synthesis of a fluorescent covalent organic framework (COF) using perylene and pyrene building blocks (PEPy-COF), via a one-pot condensation reaction is reported. PEPy-COF is crystallized into 2D nanosheets with a cubic and prismatic crystalline morphology and demonstrates structural stability at temperatures up to 500 °C. The structural morphology is confirmed using X-ray diffraction and atomic-level simulations. These 2D porous polymer sheets form a tetragonal framework that is found to have a high specific surface area of 772 m 2 g −1 . Based on the definition of porous materials, the network is mesoporous with an observed pore size of 3.03 nm, which is in good agreement with the material's calculated pore size. The experimentally obtained HOMO-LUMO band gap is 2.62 eV, confirming the semiconducting nature of PEPy-COF. PEPy-COF emits a shiny blue luminescence under UV and visible light. This luminescence intensity is temperature-dependent in solvents with different polarities and dielectric constants demonstrating that the PEPy-COF has potential use in a wide range of temperature-sensing devices. The fluorescence intensity ratio is similar for different temperatures under ultra-sound conditions and varying solvents.

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Section: Introductionmentioning

confidence: 99%

Pyrene‐Based Polyimide Covalent Organic Framework with Temperature‐Dependent Fluorescence

Zadehnazari

Khosropour

Altaf

et al. 2023

Advanced Optical Materials

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Twisted intramolecular charge‐transfer state of trans‐3‐(N,N‐Dimethylamino)‐4'‐cyanostilbene: The C−C bond twisting

Hsu

Yang

2023

J Chinese Chemical Soc

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Whether a twisted intramolecular charge‐transfer (TICT) state is formed is an important issue for understanding the fluorescence properties of a push‐pull organic dye. Here we report a position effect of the donor substituent on the TICT state formation of aminostilbenes: namely, trans‐3‐(N,N‐dimethylamino)‐4′‐cyanostilbene (mDCS) behaves differently from its TICT‐free para isomer DCS and forms a TICT state in acetonitrile (MeCN). The TICT state of mDCS also differs from that of many previously reported aminostilbenes by twisting a C−C bond instead of a C−N bond. In addition, among the ring‐bridged model compounds mDCS‐N, mDCS‐C1, and mDCS‐C2, we observed an unusual electronic effect of the ring‐bridging in mDCS‐C2 that mitigates the impact of the TICT state on the fluorescence properties. Both the C−C bond twisting in mDCS and the ring‐bridging electronic effect in mDCS‐C2 provide new insights into the TICT chemistry of aminostilbenes.

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Blue Emission of Tetrafluorobenzocarbazole Under the Interactions of Nitrogen–oxygen Saturated hydrogen Bonds with Aggregated Proton Acid

Lian

Zhou

et al. 2022

J Fluoresc

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A comparative study on photophysics of meso-substituted mono- and bis-BODIPY carbazoles

Cited by 7 publications

References 38 publications

Pyrene‐Based Polyimide Covalent Organic Framework with Temperature‐Dependent Fluorescence

Pyrene‐Based Polyimide Covalent Organic Framework with Temperature‐Dependent Fluorescence

Twisted intramolecular charge‐transfer state of trans‐3‐(N,N‐Dimethylamino)‐4'‐cyanostilbene: The C−C bond twisting

Blue Emission of Tetrafluorobenzocarbazole Under the Interactions of Nitrogen–oxygen Saturated hydrogen Bonds with Aggregated Proton Acid

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