{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T18:27:35Z","timestamp":1760898455435,"version":"build-2065373602"},"reference-count":28,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2018,5,31]],"date-time":"2018-05-31T00:00:00Z","timestamp":1527724800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Luminescence"],"published-print":{"date-parts":[[2018,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We report on the comprehension of novel europium activated hybrid organic Eu(dmh)<jats:sub>3<\/jats:sub>phen (Eu: europium, dmh: 2,6\u2010dimethyl\u20103,5\u2010heptanedione, phen: 1,10 phenanthroline) organo\u2010metallic complexes, synthesized at different pH values by the solution technique. Photo physical properties of these complexes in various basic and acidic solvents were probed by UV\u2013vis optical absorption and photoluminescence (PL) spectra. Minute differences in optical absorption peaks with variable optical densities were encountered with the variation in solvent from basic (chloroform, toluene, tetrahydrofuran) to acidic (acetic acid) media, revealing bathochromic shift in the absorption peaks. The PL spectra of the complex in various acidic and basic organic solvents revealed the position of the emission peak at 613\u00a0nm irrespective of the changes in solvents whereas the excitation spectrum almost matched with that of the UV\u2013vis absorption data. The optical density was found to be maximum for the complex with pH\u00a07.0 whereas it gradually decreased when pH was lowered to 6.0 or raised to 8.0 at an interval of 0.5, demonstrating its pH sensitive nature. Several spectroscopic parameters related to probability of transition such as absorbance <jats:italic>A<\/jats:italic>(<jats:italic>\u03bb<\/jats:italic>), Napierian absorption coefficient <jats:italic>\u03b1<\/jats:italic>(<jats:italic>\u03bb<\/jats:italic>), molecular absorption cross\u2010section <jats:italic>\u03c3<\/jats:italic>(<jats:italic>\u03bb<\/jats:italic>), radiative lifetime (<jats:italic>\u03c4<\/jats:italic><jats:sub>0<\/jats:sub>) and oscillator strength (<jats:italic>f<\/jats:italic>) were calculated from UV\u2013vis spectra. The relative intensity ratio (<jats:italic>R<\/jats:italic>\u2010ratio), calculated from the emission spectra was found to be almost the same in all the organic solvents. The optical energy gap, calculated for the designed complexes were found to be well in accordance with the ideal acceptance value of energy gap of the emissive materials used for fabrication of red organic light\u2010emitting diode (OLED). The relation between Stoke's shift and solvent polarity function was established by Lippert\u2013Mataga plot. This remarkable independence of the electronic absorption spectra of Eu complexes on the nature of the solvent with unique emission wavelength furnishes its potential to serve as a red light emitter for solution processed OLEDs, display panels and solid\u2010state lighting.<\/jats:p>","DOI":"10.1002\/bio.3497","type":"journal-article","created":{"date-parts":[[2018,5,31]],"date-time":"2018-05-31T05:31:53Z","timestamp":1527744713000},"page":"968-980","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Assessment of spectroscopic parameters of solvated Eu(dmh)<sub>3<\/sub>phen organometallic complex in various basic and acidic solvents"],"prefix":"10.1002","volume":"33","author":[{"given":"Dipti","family":"Chitnis","sequence":"first","affiliation":[{"name":"Department of Physics RTM Nagpur University  Nagpur India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8115-9010","authenticated-orcid":false,"given":"N. Thejo","family":"Kalyani","sequence":"additional","affiliation":[{"name":"Department of Applied Physics Laxminarayan Institute of Technology  Nagpur India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sanjay","family":"Dhoble","sequence":"additional","affiliation":[{"name":"Department of Physics RTM Nagpur University  Nagpur India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,5,31]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.98799"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/347539a0"},{"issue":"9","key":"e_1_2_6_4_1","first-page":"1699","volume":"1","author":"Sasabe H.","year":"2013","journal-title":"J. Mater. Chem."},{"key":"e_1_2_6_5_1","first-page":"1","volume":"4","author":"Zheng H.","year":"2013","journal-title":"Nat. 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