Henao, Juan D. Suh, Young-Woong Lee, Jeong-Kyu Kung, Mayfair C. Kung, Harold H. 2024-01-20T22:05:02Z 2024-01-20T22:05:02Z 2021-09-01 2008-12-03 0002-7863 https://pubs.kist.re.kr/handle/201004/132885 Binding of AuCl4- to amine groups tethered to the interior of a 2 nm siloxane nanocage was determined in solutions containing various concentrations of acid. The mode of binding was inferred from EXAFS and UV-vis spectra to be by ligand exchange of amine for chloride, which implies that the amines remain unprotonated. Cyclic voltammetry confirmed that the Au complexes bind to the nanocage interior and established a 1: 1 relationship between bound Au complex and amine groups. The results suggested a 5-7 pH unit shift in the protonation constant of the interior amines relative to free amines in solution. English AMER CHEMICAL SOC CONSTANTS SHIFTS ACIDS Striking Confinement Effect: AuCl4- Binding to Amines in a Nanocage Cavity Article 10.1021/ja806179j 1 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.130, no.48, pp.16142 - + JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 130 48 16142 + scie scopus 000263319800009 2-s2.0-57149108268 Chemistry, Multidisciplinary Chemistry Article CONSTANTS SHIFTS ACIDS