Mechanoluminescence and aggregation-enhanced emission (AEE) of an In-MOF based on 9,9’-diphenyl-9H-fluorene tetraacid linker

Nanoscale ◽  
2021 ◽  
Author(s):  
Swati Jindal ◽  
Gulshan Anjum ◽  
Vijay Kumar Maka ◽  
J. Narasimha Moorthy
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Solid State Fluorescence

A water-stable In-MOF, constructed based on a conformationally-flexible tetraacid linker, i.e., 2,7-bis(3,5-dicarboxyphenyl)-9,9’-diphenyl-9H-fluorene, i.e., H4DPF, is shown to exhibit significantly enhanced solid-state fluorescence quantum yield (Φf) of 23% in comparison to...

Control of Interchain Contacts, Solid-State Fluorescence Quantum Yield, and Charge Transport of Cationic Conjugated Polyelectrolytes by Choice of Anion

2006 ◽  
Vol 128 (51) ◽  
pp. 16532-16539 ◽  
Author(s):  
Renqiang Yang ◽  
Andres Garcia ◽  
Dmitry Korystov ◽  
Alexander Mikhailovsky ◽  
Guillermo C. Bazan ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Charge Transport ◽  
Fluorescence Quantum Yield ◽  
Conjugated Polyelectrolytes ◽  
Solid State Fluorescence

scholarly journals Solid-State Fluorescence Enhancement of Bromine-Substituted Trans-Enaminone Derivatives

2020 ◽  
Vol 02 (01) ◽  
pp. 033-040 ◽  
Author(s):  
Hua Li ◽  
Haiyang Shu ◽  
Xin Wang ◽  
Xiaofu Wu ◽  
Hongkun Tian ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Decay Rate ◽  
Fluorescence Quantum Yield ◽  
Radiative Decay ◽  
Theoretical Calculations ◽  
Halogen Bonding ◽  
Radiative Decay Rate ◽  
Solid State Fluorescence ◽  
High Fluorescence

Halogen bonding, as a kind of intermolecular interaction, has rarely been used to tune solid-state emission properties of luminescent materials, especially fluorescent materials. Herein, three trans-enaminone (TE) derivatives (nonbrominated TE, monobrominated BrTE, and tribrominated Br3TE) with aggregation-induced emission property have been designed and synthesized. Two types of BrTE crystals (BrTE-B and BrTE-G) with different fluorescence properties were obtained. It was observed that their solid-state fluorescence has been enhanced by the formation of halogen bonding. In particular, the crystal BrTE-G containing Br…π interactions exhibits a fluorescence quantum yield (9.6%) nearly sevenfold higher than BrTE-B, the crystal without halogen bonding (1.4%), and fivefold higher than the nonbrominated TE derivative (2.1%). By careful inspection of the single-crystal data and theoretical calculations, the high fluorescence quantum yield of BrTE-G appears to be due to halogen-bonding interactions as well as multiple stronger intermolecular interactions which may restrain molecular motions, leading to the reduced nonradiative decay rate and the enhanced radiative decay rate. Additionally, increasing the number of bromine substituents may further promote the radiative decay rate, explaining therefore the higher fluorescence quantum yield (12.5%) of Br3TE.

Facile preparation of solid-state fluorescent carbon dots with high fluorescence quantum yield and application in rapid latent fingerprints detection

2021 ◽  
Author(s):  
Hai-Jiao Wang ◽  
Wan-Yi Hou ◽  
Jing Kang ◽  
Xin-Yu Zhai ◽  
Hongli Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Latent Fingerprints ◽  
Energy Resonance ◽  
Facile Preparation ◽  
High Fluorescence ◽  
Fluorescent Carbon Dots ◽  
High Fluorescence Quantum Yield ◽  
Resonance Transfer

Due to the direct π - π interaction and excessive energy resonance transfer, it is very challenging to prepare CDs with high fluorescence quantum yield (QY) in solid state. In...

scholarly journals Synthesis, spectroscopic and Hirshfeld surface analysis and fluorescence studies of (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(4-hydroxyphenyl)prop-2-en-1-one] N,N-dimethylformamide disolvate

2018 ◽  
Vol 74 (6) ◽  
pp. 835-839
Author(s):  
Huey Chong Kwong ◽  
Ai Jia Sim ◽  
C. S. Chidan Kumar ◽  
Ching Kheng Quah ◽  
Suchada Chantrapromma ◽  
...  
Keyword(s):  
Double Bond ◽  
Solid State ◽  
Surface Analysis ◽  
Fluorescence Quantum Yield ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Yellow Light ◽  
Fluorescence Studies ◽  
Compound C ◽  
Solid State Fluorescence

In the bischalcone molecule of the title compound, C24H18O4·2C3H7NO, the central benzene and terminal hydroxyphenyl rings form a dihedral angle of 14.28 (11)° and the central C=C double bond adopts a trans configuration. In the crystal, the bischalcone and solvate molecules are interconnected via O—H...O hydrogen bonds, which were investigated by Hirshfeld surface analysis. Solid-state fluorescence was measured at λex = 4400 Å. The emission wavelength appeared at 5510 Å, which corresponds to yellow light and the solid-state fluorescence quantum yield (F f) is 0.18.

scholarly journals Solid-State Highly Efficient DR Mono and Poly-Dicyano-Phenylenevinylene Fluorophores

2018 ◽  
Author(s):  
Barbara Panunzi ◽  
Rosita Diana ◽  
Simona Concilio ◽  
Lucia Sessa ◽  
Rafi Shikler ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Properties ◽  
Crystallographic Data ◽  
Time Dependent ◽  
Aggregation Induced Emission ◽  
Solid Films ◽  
Highly Efficient ◽  
Organic Solid

A highly efficient deep red (DR) emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of aggregation-induced emission (AIE) effect.

Enhancement of photostability and fluorescence quantum yield of DXP in solid state by using mixed solvent

2019 ◽  
Vol 717 ◽  
pp. 119-123
Author(s):  
Mingcai Xie ◽  
Daocheng Hong ◽  
Sushu Wan ◽  
Mingyi Xie ◽  
Yuxi Tian
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Mixed Solvent

scholarly journals A series of 4,5,9,10-tetrahydropyrene-based tetraarylethenes: synthesis, structures and solid-state emission behavior

RSC Advances ◽  
2018 ◽  
Vol 8 (27) ◽  
pp. 15173-15180 ◽  
Author(s):  
Zhao-Ming Zhang ◽  
Bao-Xi Miao ◽  
Xin-Xue Tang ◽  
Zhong-Hai Ni
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Emission Behavior

Tetraarylethenes with different π-conjugation degrees can be realized by controlling the number of 4,5,9,10-tetrahydropyrene segments. However, the fluorescence quantum yield of these compounds in films doesn't increase with the π-conjugation degree.

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