Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 45, Pages 19878-19883Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007760
Keywords
flexible crystals; fluorescence properties; green fluorescent protein chromophore; mechanical properties; pi-stacking interactions
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Funding
- DST, New Delhi [DST/SJF/CSA-02/2014-15]
- SERB [EMR/2017/005008]
- IISER Kolkata
- CSIR India [01(2848)/16/EMR-II]
- DST-SERB [PDF/2016/000262, PDF/2018/002502]
- CSIR [01(2848)/16/EMR-II]
- DST-INSPIRE
- KVPY [SX-1411075]
- CSIR
- Kerala State Council for Science, Technology and Environment (KSCSTE), Thiruvananthapuram, India [004/YSS/CS/KM/2013/KSCSTE]
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Single crystals of optoelectronic materials that respond to external stimuli, such as mechanical, light, or heat, are immensely attractive for next generation smart materials. Here we report single crystals of a green fluorescent protein (GFP) chromophore analogue with irreversible mechanical bending and associated unusual enhancement of the fluorescence, which is attributed to the strained molecular packing in the perturbed region. Soft crystalline materials with such fluorescence intensity modulations occurring in response to mechanical stimuli under ambient pressure conditions will have potential implications for the design of technologically relevant tunable fluorescent materials.
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