{"id":"https://openalex.org/W2016758960","doi":"https://doi.org/10.1139/v90-081","title":"Conformational isomerism in squaraines: saturation transfer NMR studies on hydroxy squaraines","display_name":"Conformational isomerism in squaraines: saturation transfer NMR studies on hydroxy squaraines","publication_year":1990,"publication_date":"1990-04-01","ids":{"openalex":"https://openalex.org/W2016758960","doi":"https://doi.org/10.1139/v90-081","mag":"2016758960"},"language":"en","primary_location":{"id":"doi:10.1139/v90-081","doi":"https://doi.org/10.1139/v90-081","is_oa":true,"landing_page_url":"https://doi.org/10.1139/v90-081","pdf_url":"https://cdnsciencepub.com/doi/pdf/10.1139/v90-081","source":{"id":"https://openalex.org/S9189650","display_name":"Canadian Journal of Chemistry","issn_l":"0008-4042","issn":["0008-4042","1480-3291"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","norway-1","poland-40","russia-white-list-3"],"host_organization":"https://openalex.org/P4310312929","host_organization_name":"Canadian Science Publishing","host_organization_lineage":["https://openalex.org/P4310312929"],"host_organization_lineage_names":["Canadian Science Publishing"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Canadian Journal of Chemistry","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://cdnsciencepub.com/doi/pdf/10.1139/v90-081","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5036892538","display_name":"Peter Michael Kazmaier","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210159094","display_name":"Xerox (Canada)","ror":"https://ror.org/04z9w5078","country_code":"CA","type":"company","lineage":["https://openalex.org/I4210132870","https://openalex.org/I4210159094"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Peter M. Kazmaier","raw_affiliation_strings":["Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll","institution_ids":["https://openalex.org/I4210159094"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082134094","display_name":"Gordon K. Hamer","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210159094","display_name":"Xerox (Canada)","ror":"https://ror.org/04z9w5078","country_code":"CA","type":"company","lineage":["https://openalex.org/I4210132870","https://openalex.org/I4210159094"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Gordon K. Hamer","raw_affiliation_strings":["Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll","institution_ids":["https://openalex.org/I4210159094"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5059365533","display_name":"Richard Burt","orcid":"https://orcid.org/0000-0002-7551-3308","observed_orcids":["https://orcid.org/0000-0002-7551-3308"]},"institutions":[{"id":"https://openalex.org/I4210159094","display_name":"Xerox (Canada)","ror":"https://ror.org/04z9w5078","country_code":"CA","type":"company","lineage":["https://openalex.org/I4210132870","https://openalex.org/I4210159094"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Richard A. Burt","raw_affiliation_strings":["Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Xerox Research Centre of Canada, 2660 Speakman Drive, Mississauga, Ont., Canada L5K 2Ll","institution_ids":["https://openalex.org/I4210159094"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I4210159094"],"apc_list":null,"apc_paid":null,"fwci":0.4409,"has_fulltext":true,"cited_by_count":39,"citation_normalized_percentile":{"value":0.56076512,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":97},"biblio":{"volume":"68","issue":"4","first_page":"530","last_page":"536"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11298","display_name":"Synthesis and Properties of Aromatic Compounds","score":0.38839998841285706,"subfield":{"id":"https://openalex.org/subfields/1605","display_name":"Organic Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11298","display_name":"Synthesis and Properties of Aromatic Compounds","score":0.38839998841285706,"subfield":{"id":"https://openalex.org/subfields/1605","display_name":"Organic Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12410","display_name":"Structural and Chemical Analysis of Organic and Inorganic Compounds","score":0.31200000643730164,"subfield":{"id":"https://openalex.org/subfields/1605","display_name":"Organic Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12748","display_name":"Molecular spectroscopy and chirality","score":0.13210000097751617,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/squaraine","display_name":"squaraine","score":0.9980000257492065},{"id":"https://openalex.org/keywords/conformational-isomerism","display_name":"conformational isomerism","score":0.9580000042915344},{"id":"https://openalex.org/keywords/cis-trans-isomerism","display_name":"cis-trans isomerism","score":0.9879999756813049},{"id":"https://openalex.org/keywords/azulene","display_name":"azulene","score":0.8149999976158142},{"id":"https://openalex.org/keywords/charge-delocalization","display_name":"charge delocalization","score":0.9340000152587891},{"id":"https://openalex.org/keywords/substituent-effects","display_name":"substituent effects","score":0.6299999952316284},{"id":"https://openalex.org/keywords/free-energy-difference","display_name":"free energy difference","score":0.6669999957084656},{"id":"https://openalex.org/keywords/isomer-interconversion","display_name":"isomer interconversion","score":0.6600000262260437}],"concepts":[{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.9387050867080688},{"id":"https://openalex.org/C2776568683","wikidata":"https://www.wikidata.org/wiki/Q23005640","display_name":"Moiety","level":2,"score":0.7318515181541443},{"id":"https://openalex.org/C70050531","wikidata":"https://www.wikidata.org/wiki/Q899089","display_name":"Delocalized electron","level":2,"score":0.7225397825241089},{"id":"https://openalex.org/C2778689049","wikidata":"https://www.wikidata.org/wiki/Q898422","display_name":"Substituent","level":2,"score":0.659400224685669},{"id":"https://openalex.org/C2780378348","wikidata":"https://www.wikidata.org/wiki/Q25351438","display_name":"Ring (chemistry)","level":2,"score":0.5843468904495239},{"id":"https://openalex.org/C54516573","wikidata":"https://www.wikidata.org/wiki/Q2294","display_name":"Proton","level":2,"score":0.5394793748855591},{"id":"https://openalex.org/C9930424","wikidata":"https://www.wikidata.org/wiki/Q7426587","display_name":"Saturation (graph theory)","level":2,"score":0.518186628818512},{"id":"https://openalex.org/C103319777","wikidata":"https://www.wikidata.org/wiki/Q1979695","display_name":"Proton NMR","level":2,"score":0.48447656631469727},{"id":"https://openalex.org/C2781203326","wikidata":"https://www.wikidata.org/wiki/Q144362","display_name":"Azulene","level":2,"score":0.46838146448135376},{"id":"https://openalex.org/C163111631","wikidata":"https://www.wikidata.org/wiki/Q1952454","display_name":"Carbon-13 NMR","level":2,"score":0.45034050941467285},{"id":"https://openalex.org/C75473681","wikidata":"https://www.wikidata.org/wiki/Q188651","display_name":"Photochemistry","level":1,"score":0.3904722332954407},{"id":"https://openalex.org/C71240020","wikidata":"https://www.wikidata.org/wiki/Q186011","display_name":"Stereochemistry","level":1,"score":0.3764021694660187},{"id":"https://openalex.org/C8010536","wikidata":"https://www.wikidata.org/wiki/Q160398","display_name":"Crystallography","level":1,"score":0.32113516330718994},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.1449528932571411},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1139/v90-081","doi":"https://doi.org/10.1139/v90-081","is_oa":true,"landing_page_url":"https://doi.org/10.1139/v90-081","pdf_url":"https://cdnsciencepub.com/doi/pdf/10.1139/v90-081","source":{"id":"https://openalex.org/S9189650","display_name":"Canadian Journal of Chemistry","issn_l":"0008-4042","issn":["0008-4042","1480-3291"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","norway-1","poland-40","russia-white-list-3"],"host_organization":"https://openalex.org/P4310312929","host_organization_name":"Canadian Science Publishing","host_organization_lineage":["https://openalex.org/P4310312929"],"host_organization_lineage_names":["Canadian Science Publishing"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Canadian Journal of Chemistry","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1139/v90-081","doi":"https://doi.org/10.1139/v90-081","is_oa":true,"landing_page_url":"https://doi.org/10.1139/v90-081","pdf_url":"https://cdnsciencepub.com/doi/pdf/10.1139/v90-081","source":{"id":"https://openalex.org/S9189650","display_name":"Canadian Journal of Chemistry","issn_l":"0008-4042","issn":["0008-4042","1480-3291"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","norway-1","poland-40","russia-white-list-3"],"host_organization":"https://openalex.org/P4310312929","host_organization_name":"Canadian Science Publishing","host_organization_lineage":["https://openalex.org/P4310312929"],"host_organization_lineage_names":["Canadian Science Publishing"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Canadian Journal of Chemistry","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2016758960.pdf","grobid_xml":"https://content.openalex.org/works/W2016758960.grobid-xml"},"referenced_works_count":1,"referenced_works":["https://openalex.org/W1041265346"],"related_works":["https://openalex.org/W2010095332","https://openalex.org/W3197216962","https://openalex.org/W1982102322","https://openalex.org/W2333825732","https://openalex.org/W1978053655","https://openalex.org/W2119152184","https://openalex.org/W4403698777","https://openalex.org/W2079165443","https://openalex.org/W2060555839","https://openalex.org/W4413115170"],"abstract_inverted_index":{"The":[0,13,110],"proton":[1,85],"and":[2,7,24,73,99,126,132],"13C":[3],"NMR":[4,86],"of":[5,31,50,54,64,78],"azulene":[6],"dialkylaminohydroxyphenyl":[8],"squaraines":[9,71],"have":[10],"been":[11],"investigated.":[12],"four-membered":[14],"ring":[15,40],"carbon":[16],"resonances":[17],"occur":[18],"in":[19,83,87],"the":[20,28,38,42,55,76,84,115],"180\u2013190":[21],"ppm":[22],"range":[23],"are":[25,96],"attributed":[26],"to":[27,41,62,123],"cyclobutenediylium":[29],"character":[30],"this":[32],"structure.":[33],"Some":[34],"charge":[35],"delocalization":[36],"from":[37],"central":[39],"pendent":[43],"aromatic":[44],"substituents":[45],"was":[46],"also":[47],"observed,":[48],"indicative":[49],"a":[51,65],"substituent":[52],"effect":[53],"squaraine":[56,81],"moiety":[57],"on":[58],"aminoaromatic":[59],"systems":[60],"equivalent":[61],"that":[63,93],"formyl":[66],"or":[67],"acetyl":[68],"group.":[69],"Hydroxy":[70],"10":[72,131],"11":[74,133],"show":[75],"presence":[77],"two":[79,116],"isomeric":[80],"species":[82,95],"deuterochloroform.":[88],"Saturation":[89],"transfer":[90],"experiments":[91],"confirm":[92],"these":[94,108],"readily":[97],"interconverted,":[98],"cis/trans":[100],"isomerism":[101],"[Formula:":[102],"see":[103],"text]":[104],"is":[105,121],"consistent":[106],"with":[107],"observations.":[109],"free":[111],"energy":[112],"difference":[113],"between":[114],"isomers":[117],"at":[118],"318":[119],"K":[120],"calculated":[122],"be":[124],"3.0":[125],"3.2":[127],"kJ/mol":[128],"for":[129],"hydroxysquaraines":[130],"respectively.":[134],"Keywords:":[135],"squaraines,":[136],"saturation":[137],"transfer,":[138],"NMR.":[139]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":3},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":1}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}