Conformation controlled turn on–turn off phosphorescence in a metal-free biluminophore: thriving the paradox that exists for organic compounds

2016 ◽  
Vol 18 (40) ◽  
pp. 27910-27920 ◽  
Author(s):  
Ritika Joshi ◽  
Oinam Romesh Meitei ◽  
Manojkumar Jadhao ◽  
Himank Kumar ◽  
Sujit Kumar Ghosh
Keyword(s):  
Organic Compounds ◽  
Metal Free ◽  
Turn On ◽  
Intense Emission ◽  
Conformational Regulation ◽  
Fluorescence And Phosphorescence

The dual state intense emission, both fluorescence and phosphorescence, of CBIQD by way of conformational regulation–deregulation.

Supramolecular Self-Assembly of Nitro-incorporated Quinoxaline Framework: Insights into the Origin of Fluorescence Turn-on Response towards Benzene group of VOCs

The Analyst ◽  
2021 ◽  
Author(s):  
Megha Basak ◽  
Gopal Das
Keyword(s):  
Volatile Organic Compounds ◽  
Human Health ◽  
Organic Compounds ◽  
Self Assembly ◽  
Turn On ◽  
Volatile Organic ◽  
Fluorescence Turn On

Hazardous volatile organic compounds (VOCs) can significantly impact human health and the environment. Hence, the detection of VOCs has become foremost important. Quinoxaline-based fluorimetric probe (1) unveils a notable “Turn-On”...

Turn-on fluorimetric sensor for water dispersed volatile organic compounds - A nanosponge approach

2020 ◽  
Vol 311 ◽  
pp. 127904 ◽  
Author(s):  
Anna Kisiel ◽  
Barbara Baniak ◽  
Krzysztof Maksymiuk ◽  
Agata Michalska
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Turn On ◽  
Volatile Organic

Mechanoresponsive turn-on phosphorescence by a desymmetrization approach

2020 ◽  
Vol 56 (50) ◽  
pp. 6810-6813
Author(s):  
Yosuke Tani ◽  
Mao Komura ◽  
Takuji Ogawa
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Metal Free ◽  
Turn On

Mechanoresponsive turn-on of room-temperature phosphorescence of a metal-free organic 1,2-diketone is reported. Desymmetrization selectively modifies the emission of the crystal.

Transition metal-free synthesis of alkyl pinacol boronates

2020 ◽  
Vol 18 (44) ◽  
pp. 8939-8974 ◽  
Author(s):  
Kanak Kanti Das ◽  
Swagata Paul ◽  
Santanu Panda
Keyword(s):  
Transition Metal ◽  
Organic Compounds ◽  
Metal Free

This review systematically outlined the research in the area of transition metal free synthesis of alkyl pinacol boronates, which are versatile and important scaffolds to construct diverse organic compounds.

scholarly journals Metal-Free Polymerizations of Microencapsulated Activated Alkynes for Autonomous Damage Visualization of Polymers

2021 ◽  
Author(s):  
Ting Han ◽  
Shusheng Chen ◽  
Xinnan Wang ◽  
Xinyao Fu ◽  
Haifei Wen ◽  
...  
Keyword(s):  
Composite Film ◽  
Polymer Film ◽  
Chemical Reactions ◽  
Mechanical Damage ◽  
Metal Free ◽  
Turn On ◽  
Wide Range ◽  
Additional Protection ◽  
Activated Alkynes ◽  
Damage Visualization

The development of autonomous materials with desired performance and built-in visualizable sensing units is of great academic and industrial significance. Although a wide range of damage indication methods have been reported, the “turn-on” sensing mechanism by damaging events based on microcapsule systems, especially those relying on chemical reactions to elicit a chromogenic response, are still very limited. Herein, a facile and metal-free polymerization route with an interesting reaction-induced coloration effect is demonstrated. Under the catalysis of 1,4-diazabicyclo[2.2.2]octane (DABCO), the polymerizations of difunctional or trifunctional activated alkynes proceed very quickly at 0 oC in air. A series of polymers composed of stereoregular enyne structure (major unit) and divinyl ether structure (minor unit) are obtained. Both the catalyst and monomers are colorless while the polymerized products are deep-colored. This process can be applied for the damage visualization of polymers using the microencapsulation technique. Microcapsules containing the reactive alkyne monomer are prepared and mixed in a DABCO-dispersed polymer film. The mechanical damage of this composite film can be readily visualized once the reaction is initiated from the ruptured microcapsules. Moreover, the newly formed polymer automatically sealed the cracks with an additional protection function.

A turn-on and colorimetric metal-free long lifetime fluorescent probe and its application for time-resolved luminescent detection and bioimaging of cysteine

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53660-53664 ◽  
Author(s):  
Xiaoqing Xiong ◽  
Laijiu Zheng ◽  
Jun Yan ◽  
Fang Ye ◽  
Yongfang Qian ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Fluorescent Chemosensor ◽  
Time Resolved ◽  
Organic Fluorophores ◽  
Metal Free ◽  
Turn On ◽  
Long Lifetime

An excellent turn-on and colorimetric fluorescent chemosensor DCF-MPYM-thiol for sensing Cys based on metal-free organic fluorophores has been synthesized.

A metal-free fluorescence turn-on molecular probe for detection of nucleoside triphosphates

2017 ◽  
Vol 53 (1) ◽  
pp. 208-211 ◽  
Author(s):  
Debabrata Maity ◽  
Mao Li ◽  
Martin Ehlers ◽  
Carsten Schmuck
Keyword(s):  
Fluorescence Probe ◽  
Anion Binding ◽  
Molecular Probe ◽  
Binding Motif ◽  
Metal Free ◽  
Turn On ◽  
Nucleoside Triphosphates ◽  
Fluorescence Turn On

We report a fluorescence probe 1, which contains a naphthalimide fluorophore with two symmetric peptidic arms equipped with a tailor-made anion-binding motif, the guanidiniocarbonyl pyrrole moiety, for the detection of nucleoside triphosphates.

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