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The compounds exhibit strong spin-allowed 1MLCT bands in the visible domain (489\u2013521 nm) as well as weak 1GS to 3MLCT bands within the 668\u2013815 nm domain. The compounds display strong luminescence from the 3MLCT state in the near-infrared domain (728\u2013780 nm) at room temperature having lifetimes in the range of 20.0\u2013171.0 ns. After coordination of [Os(tpy-PhCH3\/H2pbbzim)2]2+ unit to the terpyridine site of tpy-Hbzim-dipy, the complexes offer vacant pyridine\u2013imidazole motifs for interacting with cationic and anionic guests. Consequently, photophysical properties of the compounds were tuned to a great extent upon interaction with selected cations, anions, pH, as well as protons. Anion-induced alteration of the ground- and excited-state properties of the compound lead to recognition of specific anions in solution. Significant change in the optical spectral behaviors as well as switching of emission spectral properties of the compounds was done in the NIR region upon treating with anions, cations, protons, and solvents (dichloromethane, acetonitrile, methanol, dimethylsulfoxide, and water). Moreover, the optical outputs in response to external stimuli were used to demonstrate binary functions of two-input IMPLICATION, NOR, and XNOR logic gates.<\/jats:p>","DOI":"10.1021\/acsomega.8b03083","type":"journal-article","created":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T22:47:29Z","timestamp":1548802049000},"page":"2241-2255","source":"Crossref","is-referenced-by-count":5,"title":["Stimuli-Responsive Near-Infrared Emissive Os(II)\u2013Terpyridine Complexes\nwith a Sense of Logic"],"prefix":"10.1021","volume":"4","author":[{"given":"Manoranjan","family":"Bar","sequence":"first","affiliation":[{"name":"Jadavpur University , , ,","place":["Kolkata, India, 700032"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sourav","family":"Deb","sequence":"additional","affiliation":[{"name":"Jadavpur University , , ,","place":["Kolkata, India, 700032"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shruti","family":"Mukherjee","sequence":"additional","affiliation":[{"name":"Jadavpur University , , ,","place":["Kolkata, India, 700032"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9720-6889","authenticated-orcid":true,"given":"Sujoy","family":"Baitalik","sequence":"additional","affiliation":[{"name":"Jadavpur University , , ,","place":["Kolkata, India, 700032"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2019,1,29]]},"reference":[{"key":"2026090414082890200_cit1","volume-title":"Molecular Fluorescence:\nPrinciples and Applications","author":"Valeur","year":"2002"},{"key":"2026090414082890200_cit2","doi-asserted-by":"publisher","first-page":"59","DOI":"10.1016\/s0010-8545(00)00242-3","article-title":"Luminescent\nchemosensors for transition metal ions","volume":"205","author":"Prodi","year":"2000","journal-title":"Coord.\nChem. 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