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Orange and yellow emissive crystals of 1 (1O, 1Y) exhibit an unusual \u201cback and forth\u201d fluorescence response to mechanical force. Gentle crushing (mild pressure) of the orange or yellow emissive crystal results in hypsochromic shift to cyan emissive fragments (\u03bbem = 498\u2013501 nm) with a large wavelength shift \u0394\u03bbem = \u221271 to \u221296 nm, while further grinding results in bathochromic swing to green emissive powder \u03bbem = 540\u2013550 nm, \u0394\u03bbem = +40 to 58 nm. Single-crystal X-ray diffraction study reveals that molecules are packed by weak interactions, such as C\u2013H\u00b7\u00b7\u00b7\u03c0, C\u2013H\u00b7\u00b7\u00b7N, and C\u2013H\u00b7\u00b7\u00b7F, which facilitate intermolecular charge transfer in the crystal. With the aid of structural, spectroscopic, and morphological studies, we established the interplay between intermolecular and intramolecular charge-transfer interaction that is responsible for this elusive mechanochromic luminescence. Moreover, we have also demonstrated the application of this organic material for chlorine gas sensing in solid state.<\/jats:p>","DOI":"10.1021\/acsomega.8b00250","type":"journal-article","created":{"date-parts":[[2018,5,16]],"date-time":"2018-05-16T14:13:30Z","timestamp":1526480010000},"page":"5291-5300","source":"Crossref","is-referenced-by-count":37,"title":["Distinct Mechanoresponsive Luminescence, Thermochromism,\nVapochromism, and Chlorine Gas Sensing by a Solid-State Organic Emitter"],"prefix":"10.1021","volume":"3","author":[{"given":"Anirban","family":"Adak","sequence":"first","affiliation":[{"name":"Indian Institute for Science and Educational Research Kolkata , , , ,","place":["Mohanpur, Kolkata, India, 741246"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tamas","family":"Panda","sequence":"additional","affiliation":[{"name":"New York University Abu Dhabi , Saadiyat Island, , , P.O. Box 129188","place":["Abu Dhabi, United Arab Emirates"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anju","family":"Raveendran","sequence":"additional","affiliation":[{"name":"CSIR-National Institute for Interdisciplinary Science & Technology , , , ,","place":["Thiruvanthapuram, Kerala, India, 695019"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kochan Sathyaseelan","family":"Bejoymohandas","sequence":"additional","affiliation":[{"name":"CSIR-National Institute for Interdisciplinary Science & Technology , , , ,","place":["Thiruvanthapuram, Kerala, India, 695019"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K. S.","family":"Asha","sequence":"additional","affiliation":[{"name":"Indian Institute for Science and Educational Research , , , ,","place":["Thiruvanthapuram, Kerala, India, 695551"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. P.","family":"Prakasham","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Bombay , , ,","place":["Mumbai, India, 400076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Balaram","family":"Mukhopadhyay","sequence":"additional","affiliation":[{"name":"Indian Institute for Science and Educational Research Kolkata , , , ,","place":["Mohanpur, Kolkata, India, 741246"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6297-2070","authenticated-orcid":true,"given":"Manas K.","family":"Panda","sequence":"additional","affiliation":[{"name":"CSIR-National Institute for Interdisciplinary Science & Technology , , , ,","place":["Thiruvanthapuram, Kerala, India, 695019"]},{"name":"Academy of Scientific and Innovative Research (AcSIR) , ,","place":["New Delhi, India, 110025"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2018,5,16]]},"reference":[{"key":"2026090208383352200_cit1","doi-asserted-by":"publisher","first-page":"3467","DOI":"10.1039\/c0cs00204f","article-title":"Electroluminescent materials for white organic light emitting diodes","volume":"40","author":"Farinola","year":"2011","journal-title":"Chem. 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