Volume 58, Issue 8 pp. 2284-2288
Communication

Paintable Room-Temperature Phosphorescent Liquid Formulations of Alkylated Bromonaphthalimide

Goudappagouda

Goudappagouda

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

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Ananthakrishnan Manthanath

Ananthakrishnan Manthanath

Amrita Vishwa Vidyapeetham University, Amritapuri, Kerala-, 690525 India

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Vivek Chandrakant Wakchaure

Vivek Chandrakant Wakchaure

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

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Kayaramkodath Chandran Ranjeesh

Kayaramkodath Chandran Ranjeesh

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

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Tamal Das

Tamal Das

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

Physical and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

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Kumar Vanka

Kumar Vanka

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

Physical and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

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Takashi Nakanishi

Takashi Nakanishi

Frontier Molecules Group, International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044 Japan

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Sukumaran Santhosh Babu

Corresponding Author

Sukumaran Santhosh Babu

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-, 411008 India

Academy of Scientific and Innovative Research (AcSIR), New Delhi, India

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First published: 12 December 2018
Citations: 94

In memory of Helmuth Möhwald

Graphical Abstract

The room-temperature phosphorescence features of a solvent-free organic liquid phosphor in air were explored. Doping of the phosphor with carbonyl guests resulted in enhanced phosphorescence, and hence a large-area paintable phosphorescent liquid composite with improved lifetime and quantum yield was developed.

Abstract

Organic phosphors have been widely explored with an understanding that crystalline molecular ordering is a requisite for enhanced intersystem crossing. In this context, we explored the room-temperature phosphorescence features of a solvent-free organic liquid phosphor in air. While alkyl chain substitution varied the physical states of the bromonaphthalimides, the phosphorescence remained unaltered for the solvent-free liquid in air. As the first report, a solvent-free liquid of a long swallow-tailed bromonaphthalimide exhibits room-temperature phosphorescence in air. Doping of the phosphor with carbonyl guests resulted in enhanced phosphorescence, and hence a large-area paintable phosphorescent liquid composite with improved lifetime and quantum yield was developed.

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