{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T20:59:17Z","timestamp":1791925157517,"version":"4.3.4"},"reference-count":83,"publisher":"American Chemical Society (ACS)","issue":"25","license":[{"start":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T00:00:00Z","timestamp":1686528000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002383","name":"King Saud University","doi-asserted-by":"publisher","award":["RSP2023R431"],"award-info":[{"award-number":["RSP2023R431"]}],"id":[{"id":"10.13039\/501100002383","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,6,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Organic compounds exhibit significant nonlinear optical (NLO) properties and can be utilized in various areas like optical parameters, fiber optics, and optical communication. Herein, a series of chromophores (DBTD1\u2013DBTD6) with an A\u2212\u03c01\u2013D1\u2013\u03c02\u2013D2 framework was derived from a prepared compound (DBTR) by varying the structure of \u03c0-spacer and terminal acceptor. The DBTR and its investigated compounds were optimized at the M06\/6-311G\u00ad(d,p) level of theory. Frontier molecular orbitals (FMOs), nonlinear optical (NLO) properties, global reactivity parameters (GRPs), natural bonding orbital (NBO), transition density matrix (TDM), molecular electrostatic potential (MEP), and natural population analysis (NPA) were accomplished at the abovementioned level to describe the NLO findings. DBTD6 has the lowermost band gap (2.131 eV) among all of the derived compounds. The decreasing order of highest occupied molecular orbital\u2013lowest unoccupied molecular orbital (HOMO\u2013LUMO) energy gap values was DBTR &amp;gt; DBTD1 &amp;gt; DBTD2 &amp;gt; DBTD3 &amp;gt; DBTD4 &amp;gt; DBTD5 &amp;gt; DBTD6. The NBO analysis was carried out to describe noncovalent interactions such as conjugative interactions and electron delocalization. From all of the examined substances, DBTD5 showed the highest \u03bbmax value at 593.425 nm (in the gaseous phase) and 630.578 nm (in chloroform solvent). Moreover, the \u03b2tot and \u27e8\u03b3\u27e9 amplitudes of DBTD5 were noticed to be relatively greater at 1.140 \u00d7 10\u201327 and 1.331 \u00d7 10\u201332 esu, respectively. So, these outcomes disclosed that DBTD5 depicted the highest linear and nonlinear properties in comparison to the other designed compounds, which underlines that it could make a significant contribution to hi-tech NLO devices.<\/jats:p>","DOI":"10.1021\/acsomega.3c01472","type":"journal-article","created":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T13:38:05Z","timestamp":1686577085000},"page":"22673-22683","source":"Crossref","is-referenced-by-count":28,"title":["Quantum Chemical Exploration of A\u2212\u03c01\u2013D1\u2013\u03c02\u2013D2\u2011Type\nCompounds for the Exploration of Chemical Reactivity,\nOptoelectronic, and Third-order Nonlinear Optical Properties"],"prefix":"10.1021","volume":"8","author":[{"given":"Ghulam","family":"Mustafa","sequence":"first","affiliation":[{"name":"Bahauddin Zakariya University , , ,","place":["Multan, Pakistan, 60800"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iqra","family":"Shafiq","sequence":"additional","affiliation":[{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]},{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qurat-ul-ain","family":"Shaikh","sequence":"additional","affiliation":[{"name":"Shah Abdul Latif University Khairpur , , ,","place":["Khairpur, Pakistan, 66111"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayesha","family":"Mustafa","sequence":"additional","affiliation":[{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]},{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Romaisa","family":"Zahid","sequence":"additional","affiliation":[{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]},{"name":"Khwaja Fareed University of Engineering & Information Technology , , ,","place":["Rahim Yar Khan, Pakistan, 64200"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7825-9667","authenticated-orcid":true,"given":"Faiz","family":"Rasool","sequence":"additional","affiliation":[{"name":"Bahauddin Zakariya University , , ,","place":["Multan, Pakistan, 60800"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad Adnan","family":"Asghar","sequence":"additional","affiliation":[{"name":"University of Education Lahore , , ,","place":["Lahore, Pakistan, 54770"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rabia","family":"Baby","sequence":"additional","affiliation":[{"name":"Sukkur IBA University , , , ,","place":["Sukkur, Sindh, Pakistan, 65200"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saad M.","family":"Alshehri","sequence":"additional","affiliation":[{"name":"King Saud University , , ,","place":["Riyadh, Saudi Arabia, 11451"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad","family":"Haroon","sequence":"additional","affiliation":[{"name":"Miami University , , 651 E. 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