A molecular boron cluster-based chromophore with dual emission. Issue 45 (7th May 2020)

• Record Type: Journal Article
• Authors: Anderson, Kierstyn P.; Waddington, Mary A.; Balaich, Gary J.; Stauber, Julia M.; Bernier, Nicholas A.; Caram, Justin R.; Djurovich, Peter I.; Spokoyny, Alexander M.
• Is Part Of: Dalton transactions. Volume 49:Issue 45(2020)
• Page Start: 16245
• Page End: 16251
• Publication Date: 2020-05-07
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt00826e
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Bromination of the luminescent borane, anti -B18 H22, via electrophilic substitution using AlCl3 and Br2, yields the monosubstituted derivative 4-Br- anti -B18 H21 as an air-stable crystalline solid. Abstract : Bromination of the luminescent borane, anti -B18 H22, via electrophilic substitution using AlCl3 and Br2, yields the monosubstituted derivative 4-Br- anti -B18 H21 as an air-stable crystalline solid. In contrast to the unsubstituted parent compound, 4-Br- anti -B18 H21 possesses dual emission upon excitation with UV light and exhibits fluorescence at 410 nm and phosphorescence at 503 nm, with Φ total = 0.07 in oxygen-free cyclohexane. Increased oxygen content in cyclohexane solution quenches the phosphorescence signal. The fluorescent signal intensity remains unaffected by oxygen, suggesting that this molecule could be used as a ratiometric oxygen probe.