Highly fluorescent hybrid Au/Ag nanoclusters stabilized with poly(ethylene glycol)- and zwitterion-modified thiolate ligands.

ABSTRACT: We report a simple strategy to grow highly fluorescing, near-infrared-emitting nanoclusters (NCs) made of bimetallic Au/Ag cores, surface capped with a mixture of triphenylphosphine and various monothiol ligands. The ligands include short chain aliphatic monothiols, which yields hydrophobic NCs, and poly(ethylene glycol)- or zwitterion-appended monothiols, which yield NCs that are readily dispersible in buffer media. The reaction uses well-defined triphenylphosphine-protected Au₁₁ clusters (as precursors) that are reacted with Ag(i)-thiolate complexes. The prepared materials are small (diameter <2 nm, as characterized by TEM) with emission peak at 730-760 nm and long lifetime (∼8-12 μs). The quantum yield measured for these materials in both hydrophobic and hydrophilic dispersio

SUBMITTER: Mishra D 

PROVIDER: S-EPMC7380509 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature