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In nonpolar solvents, the dye molecule predominantly exists in nonpolar structure and exhibits very low value of nonradiative decay rate constant (<jats:italic>k<\/jats:italic><jats:sub>nr<\/jats:sub>), demonstrating the emission takes place from S<jats:sub>1<\/jats:sub>\u2010<jats:styled-content style=\"fixed-case\">LE<\/jats:styled-content> to S<jats:sub>0<\/jats:sub> ground state. The fluorescence quantum yields, lifetime values of 7\u2010<jats:styled-content style=\"fixed-case\">DCCAE<\/jats:styled-content> in different solvents are rationalized on the basis of intramolecular charge transfer (<jats:styled-content style=\"fixed-case\">ICT<\/jats:styled-content>) followed by twisted intramolecular charge transfer state formation (<jats:styled-content style=\"fixed-case\">TICT<\/jats:styled-content>) as well as specific solute\u2013solvent interactions. Several solvatochromic models (such as Lippert, Dimroth, Kamlet\u2013Taft, Catal\u00e1n 3P and Catal\u00e1n 4P models) were used to analyze the solvatochromic shift of 7\u2010<jats:styled-content style=\"fixed-case\">DCCAE<\/jats:styled-content> in different solvents. The different empirical models show that the observed results are better correlate for nonchlorinated solvents and provide statistically significant best\u2010fit result. A comparison was done between comparatively new solvatochromic model (Catal\u00e1n 3P and Catal\u00e1n 4P model) with Kamlet\u2013Taft model. The ground state structure of the said molecule was optimized by using Density Functional Theory (<jats:styled-content style=\"fixed-case\">DFT<\/jats:styled-content>).<\/jats:p>","DOI":"10.1111\/php.12258","type":"journal-article","created":{"date-parts":[[2014,2,18]],"date-time":"2014-02-18T18:26:54Z","timestamp":1392748014000},"page":"734-746","source":"Crossref","is-referenced-by-count":51,"title":["Photophysics of a Coumarin in Different Solvents: Use of Different Solvatochromic Models"],"prefix":"10.1111","volume":"90","author":[{"given":"Banibrata","family":"Maity","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Patna India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aninda","family":"Chatterjee","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Patna India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Debabrata","family":"Seth","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Patna India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,3,18]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0030-4018(75)90085-1"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.120669"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/1475636031000069291"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.3109\/03602539008991449"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0960-894X(03)00490-6"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1021\/j100120a024"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/j100248a024"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0009-2614(98)01268-8"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp0486088"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/3527601791"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1021\/j100087a014"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/0301-0104(94)80010-3"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr940745l"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp021141l"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.1578057"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-1097.2004.tb00056.x"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-1097.2005.tb00184.x"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp021543t"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp003157m"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cplett.2005.08.051"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-1097.2008.00405.x"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemphys.2005.04.018"},{"key":"e_1_2_6_24_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp210433f"},{"key":"e_1_2_6_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp409405a"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp0556411"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp048032m"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp0117213"},{"key":"e_1_2_6_29_1","doi-asserted-by":"publisher","DOI":"10.1039\/c2pp25065a"},{"key":"e_1_2_6_30_1","doi-asserted-by":"publisher","DOI":"10.1039\/c2pp25288k"},{"key":"e_1_2_6_31_1","doi-asserted-by":"publisher","DOI":"10.1039\/c1cp20767a"},{"key":"e_1_2_6_32_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp402627a"},{"key":"e_1_2_6_33_1","doi-asserted-by":"publisher","DOI":"10.1111\/php.12000"},{"key":"e_1_2_6_34_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp026718d"},{"key":"e_1_2_6_35_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp026071x"},{"key":"e_1_2_6_36_1","doi-asserted-by":"publisher","DOI":"10.1246\/bcsj.29.465"},{"key":"e_1_2_6_37_1","first-page":"541","article-title":"Dipole moment and electronic structure of excited molecules","volume":"10","author":"Lippert E","year":"1955","journal-title":"Z. 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