{"corpus_id":96247648,"paper_sha":"5c24716b13dbd472f33d75f3e7da2a94d86f5a31","doi":"10.1016/J.POLYMER.2012.04.041","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":2038266163,"dblp_id":null,"acl_id":null,"title":"Photophysics of polyaniline: Sequence-length distribution dependence of photoluminescence quenching as studied by fluorescence measurements and Monte Carlo simulations","year":2012,"publication_date":"2012-06-07","venue":"","journal":{"name":"Polymer","pages":"2619-2627","volume":"53"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Chemistry"],"reference_count":43,"citation_count":15,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://ri.conicet.gov.ar/bitstream/11336/67739/2/CONICET_Digital_Nro.88539516-8715-4aa2-9bbe-6001b8413484_A.pdf","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/5c24716b13dbd472f33d75f3e7da2a94d86f5a31","s2_open_access_license":"CCBYNCSA","s2_open_access_status":"GREEN","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Abstract The dependence of the fluorescence quenching of electropolymerized poly(aniline-co-m-chloroaniline) with polymer composition has been investigated. Fluorescence emission in polyaniline is quenched when the polymer is oxidized (brought to emeraldine state); the copolymers exhibit decreasing quenching as chloroaniline contents increases. Quenching shows a strong decrease in the presence of 0.1% m-chloroaniline monomers in the feed. The presence of dichloroaniline units in the copolymer was confirmed by XPS measurements and a terpolymerization reaction scheme was developed, obtaining the kinetic parameters. By Monte Carlo simulation the sequence length distributions for different compositions were obtained and compared; it was found that quenching, for low aniline contents, requires aniline sequences of at least three units. The strong decrease in quenching at low m-chloroaniline contents is attributed to a double effect: breaking of conjugation in the emeraldine form by the presence of the chlorinated unit, and a disruption of the close chain packing in the crystalline domains, preventing state delocalization and thus efficient quenching.","claims":[{"public_id":"cl_1343f03b0232aa3c7057b78ae63ba0a3","status":"active","text":"Copolymers of aniline and m-chloroaniline exhibit decreasing quenching as chloroaniline content increases.","confidence":0.9,"contributors":[{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["extraction"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":170,"public_id":"gsgmdx9r6e","public_label":"pupuri (gsgmdx9r6e)","roles":["review"],"url":"https://sah.borca.ai/u/gsgmdx9r6e"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The 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