{"id":"https://openalex.org/A5111708977","orcid":null,"observed_orcids":[],"display_name":"Darrell E. O'Brien","raw_author_names":["Darrell E. O'Brien","Darrell E. O'brien","Darrell O'Brien"],"full_name":"Darrell E. O'Brien","works_count":37,"cited_by_count":730,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":14,"i10_index":24},"ids":{"openalex":"https://openalex.org/A5111708977","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I59386820","ror":"https://ror.org/0320rar10","display_name":"MRIGlobal","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I59386820"]},"years":[1967,1966,1964]},{"institution":{"id":"https://openalex.org/I75421653","ror":"https://ror.org/01w0d5g70","display_name":"University of Missouri\u2013Kansas City","country_code":"US","type":"education","lineage":["https://openalex.org/I75421653"]},"years":[1970]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T14099","display_name":"Synthesis and Characterization of Heterocyclic Compounds","count":29,"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/T13208","display_name":"Synthesis of heterocyclic compounds","count":21,"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/T10274","display_name":"Heterocyclic Compound Synthesis and Bioactivity","count":20,"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/T12827","display_name":"Biochemical and Molecular Research","count":6,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12410","display_name":"Structural and Chemical Analysis of Organic and Inorganic Compounds","count":5,"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"}}],"topic_share":[{"id":"https://openalex.org/T14099","display_name":"Synthesis and Characterization of Heterocyclic Compounds","value":0.0001432,"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/T13208","display_name":"Synthesis of heterocyclic compounds","value":0.0001004,"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/T12434","display_name":"Phosphodiesterase function and regulation","value":6.49e-05,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10274","display_name":"Heterocyclic Compound Synthesis and Bioactivity","value":5.61e-05,"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/T13230","display_name":"Synthesis and Reactivity of Heterocycles","value":5.43e-05,"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"}}],"x_concepts":[{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.9824416041374207},{"id":"71240020","wikidata":"https://www.wikidata.org/wiki/Q186011","display_name":"Stereochemistry","score":0.5785302519798279},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.5521331429481506},{"id":"155647269","wikidata":"https://www.wikidata.org/wiki/Q243455","display_name":"Medicinal chemistry","score":0.5287446975708008},{"id":"178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","score":0.46460241079330444}],"counts_by_year":[{"year":1959,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1962,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1963,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1964,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1965,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1966,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1967,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1968,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1969,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1970,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1973,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":1974,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1975,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1976,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1980,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1982,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1985,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":14},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":14},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":23},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":12},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":12},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":6},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":15},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":6},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":8},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":3},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":4}],"display_name_alternatives":["Darrell E. O'Brien","Darrell E. O'brien","Darrell O'Brien"],"block_key":"d obrien","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111708977","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}
