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The structures of two trivalent P species, as well as their corresponding P oxides, have been confirmed by X\u2010ray crystallography. The parent dithiazolo[5,4\u2010\n                    <jats:italic>b<\/jats:italic>\n                    :4\u2032,5\u2032\u2010\n                    <jats:italic>d<\/jats:italic>\n                    ]phosphole oxide exhibits strong blue photoluminescence at\n                    <jats:italic>\u03bb<\/jats:italic>\n                    <jats:sub>em<\/jats:sub>\n                    =442\u2005nm, with an excellent quantum yield efficiency of\n                    <jats:italic>\u03d5<\/jats:italic>\n                    <jats:sub>PL<\/jats:sub>\n                    =0.81. The photophysical properties of these compounds can be easily tuned by extension of the conjugation and modification of the phosphorus center. Compared with the established dithieno[3,2\u2010\n                    <jats:italic>b<\/jats:italic>\n                    :2\u2032,3\u2032\u2010\n                    <jats:italic>d<\/jats:italic>\n                    ]phosphole system, the incorporation of electronegative nitrogen atoms leads to significantly lowered frontier orbital energy levels, as validated by both electrochemistry and theoretical calculations, thus suggesting that the dithiazolo[5,4\u2010\n                    <jats:italic>b<\/jats:italic>\n                    :4\u2032,5\u2032\u2010\n                    <jats:italic>d<\/jats:italic>\n                    ]phospholes are valuable, air\u2010stable, n\u2010type conjugated materials. These new building blocks have been further applied to the construction of an extended oligomer with fluorene. Extension of the dithiazolophosphole core with triazole units through click reactions also provides a suitable N,N\u2010chelating moiety for metal binding and a representative molecular species was successfully used as a selective colorimetric and fluorescent sensor for Cu\n                    <jats:sup>II<\/jats:sup>\n                    ions.\n                  <\/jats:p>","DOI":"10.1002\/chem.201204375","type":"journal-article","created":{"date-parts":[[2013,4,8]],"date-time":"2013-04-08T15:44:51Z","timestamp":1365435891000},"page":"7620-7630","source":"Crossref","is-referenced-by-count":58,"title":["Dithiazolo[5,4\u2010\n                    <i>b<\/i>\n                    :4\u2032,5\u2032\u2010\n                    <i>d<\/i>\n                    ]phosphole: A Highly Luminescent Electron\u2010Accepting Building Block"],"prefix":"10.1002","volume":"19","author":[{"given":"Xiaoming","family":"He","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alva Y. 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