{"id":{"repo_id":"houston","oai_identifier":"oai:uh-ir.tdl.org:10657/5376"},"canonical_url":"https://search.dev.ndltd.org/etd/houston/oai:uh-ir.tdl.org:10657/5376","repository":{"repo_id":"houston","name":"University of Houston","base_url":"https://uh-ir.tdl.org/server/oai/request"},"display":{"title":"Benzimidazole-Based Fluorophores and Noncovalent Organic Frameworks","abstract":"The previous studies of molecular cruciforms based on distyrylbis(arylethynyl)benzenes, tetrakis(arylethynyl)benzenes, tetrakis(alkynyl)ethenes, and benzobisoxazole cruciforms, and their use as chemical sensors will be introduced and summarized. We construct a simpler "half cruciform" architecture with benzimidazole core, namely L-shaped benzimidazole fluorophores. These fluorophores showed separate frontier molecular orbitals in donor–acceptor systems, similar to benzobisoxazole cruciforms. They display change in their fluorescent emission upon exposure to bases, acids and small anions. The preparation of other benzimidazole-based sensor precursors and initial study is also included. A new class of cruciform based on the benzobisimidazole central motif is introduced together with their synthesis and computational evaluation. These benzobisimidazole cruciforms exhibit strong optical responses to bases, albeit negligible to acids. A representative cruciform was examined and showed pronounced colorimetric response to anions. Noncovalent organic frameworks are porous materials; their porosity results from noncovalent interactions. The series of perfluorinated precursors was synthesized and crystalized to obtain desired noncovalent organic frameworks. The porous framework was analyzed by porosity measurement, single and powder X-ray diffractions.","abstract_html":"The previous studies of molecular cruciforms based on distyrylbis(arylethynyl)benzenes, tetrakis(arylethynyl)benzenes, tetrakis(alkynyl)ethenes, and benzobisoxazole cruciforms, and their use as chemical sensors will be introduced and summarized. We construct a simpler "half cruciform" architecture with benzimidazole core, namely L-shaped benzimidazole fluorophores. These fluorophores showed separate frontier molecular orbitals in donor–acceptor systems, similar to benzobisoxazole cruciforms. They display change in their fluorescent emission upon exposure to bases, acids and small anions. The preparation of other benzimidazole-based sensor precursors and initial study is also included. A new class of cruciform based on the benzobisimidazole central motif is introduced together with their synthesis and computational evaluation. These benzobisimidazole cruciforms exhibit strong optical responses to bases, albeit negligible to acids. A representative cruciform was examined and showed pronounced colorimetric response to anions. Noncovalent organic frameworks are porous materials; their porosity results from noncovalent interactions. The series of perfluorinated precursors was synthesized and crystalized to obtain desired noncovalent organic frameworks. The porous framework was analyzed by porosity measurement, single and powder X-ray diffractions.","abstract_has_math":false,"creators":["Le, Ha Tuyet Mai 1987-"],"institution":"University of Houston","degree_name":"Doctor of Philosophy","degree_level":"Doctoral","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":[],"advisors":["Miljanić, Ognjen Š."],"committee_chairs":[],"committee_members":["Daugulis, Olafs","May, Jeremy A.","Xu, Shoujun","Brankovic, Stanko R."],"year":2015,"date_issued":"2015-12","date_published":"2015-12","updated_at":"2026-07-24T02:31:59Z","subjects":["Cruciform molecules","Noncovalent organic frameworks","Fluorescence","Sensing"],"languages":["eng"],"rights":["The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s)."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10657/5376","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Miljanić, Ognjen Š."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Daugulis, Olafs","May, Jeremy A.","Xu, Shoujun","Brankovic, Stanko R."]},{"key":"dc:creator","label":"Author","values":["Le, Ha Tuyet Mai 1987-"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-11-12T03:23:04Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2019-11-12T03:23:04Z"]},{"key":"dc:date.issued","label":"Date","values":["2015-12"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Houston"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Cruciform molecules","Noncovalent organic frameworks","Fluorescence","Sensing"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s)."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10657/5376"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The previous studies of molecular cruciforms based on distyrylbis(arylethynyl)benzenes, tetrakis(arylethynyl)benzenes, tetrakis(alkynyl)ethenes, and benzobisoxazole cruciforms, and their use as chemical sensors will be introduced and summarized. We construct a simpler "half cruciform" architecture with benzimidazole core, namely L-shaped benzimidazole fluorophores. These fluorophores showed separate frontier molecular orbitals in donor–acceptor systems, similar to benzobisoxazole cruciforms. They display change in their fluorescent emission upon exposure to bases, acids and small anions. The preparation of other benzimidazole-based sensor precursors and initial study is also included. A new class of cruciform based on the benzobisimidazole central motif is introduced together with their synthesis and computational evaluation. These benzobisimidazole cruciforms exhibit strong optical responses to bases, albeit negligible to acids. A representative cruciform was examined and showed pronounced colorimetric response to anions. Noncovalent organic frameworks are porous materials; their porosity results from noncovalent interactions. The series of perfluorinated precursors was synthesized and crystalized to obtain desired noncovalent organic frameworks. The porous framework was analyzed by porosity measurement, single and powder X-ray diffractions."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Benzimidazole-Based Fluorophores and Noncovalent Organic Frameworks"]}]}],"canonical_facts":{"dc:contributor.advisor":["Miljanić, Ognjen Š."],"dc:contributor.committeemember":["Daugulis, Olafs","May, Jeremy A.","Xu, Shoujun","Brankovic, Stanko R."],"dc:creator":["Le, Ha Tuyet Mai 1987-"],"dc:date.accessioned":["2019-11-12T03:23:04Z"],"dc:date.available":["2019-11-12T03:23:04Z"],"dc:date.issued":["2015-12"],"dc:description.abstract":["The previous studies of molecular cruciforms based on distyrylbis(arylethynyl)benzenes, tetrakis(arylethynyl)benzenes, tetrakis(alkynyl)ethenes, and benzobisoxazole cruciforms, and their use as chemical sensors will be introduced and summarized. We construct a simpler "half cruciform" architecture with benzimidazole core, namely L-shaped benzimidazole fluorophores. These fluorophores showed separate frontier molecular orbitals in donor–acceptor systems, similar to benzobisoxazole cruciforms. They display change in their fluorescent emission upon exposure to bases, acids and small anions. The preparation of other benzimidazole-based sensor precursors and initial study is also included. A new class of cruciform based on the benzobisimidazole central motif is introduced together with their synthesis and computational evaluation. These benzobisimidazole cruciforms exhibit strong optical responses to bases, albeit negligible to acids. A representative cruciform was examined and showed pronounced colorimetric response to anions. Noncovalent organic frameworks are porous materials; their porosity results from noncovalent interactions. The series of perfluorinated precursors was synthesized and crystalized to obtain desired noncovalent organic frameworks. The porous framework was analyzed by porosity measurement, single and powder X-ray diffractions."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/10657/5376"],"dc:language.iso":["eng"],"dc:rights":["The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s)."],"dc:subject":["Cruciform molecules","Noncovalent organic frameworks","Fluorescence","Sensing"],"dc:title":["Benzimidazole-Based Fluorophores and Noncovalent Organic Frameworks"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Doctoral"],"thesis:degree_name":["Doctor of Philosophy"],"thesis:institution_name":["University of Houston"]},"updated_at":"2026-07-24T02:31:59Z"}