The spectral relaxation dynamics and the molecular crowding effect of silver nanoclusters synthesized in the polymer scaffold

Literature Information

Publication Date 2015-08-07
DOI 10.1039/C5CP03175C
Impact Factor 3.676
Authors

Kai-Hung Wang, Chih-Wei Chang


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Abstract

We have performed a comprehensive study on the spectral relaxation dynamics of silver nanoclusters (AgNCs) synthesized in poly(methacrylic acid) (PMAA). In different polymer conformations and solvents, the spectral relaxation dynamics of PMAA–AgNCs can be globally fitted by a bi-exponential decay, the short component is about 0.2–0.3 ns, whereas the long component is in the range 1–3 ns. The spectral relaxation is associated with the energy transfer dynamics and the excitation of multiple emissive AgNCs. In this study, we have demonstrated the feasibility of using AgNCs as a fluorescent probe for fluorescence anisotropy studies. Meanwhile, the molecular crowding effects of the PMAA–AgNCs were addressed using the Triton X-100 reverse micelles. The results indicate that the fluorescence quantum yield of the AgNCs will be significantly increased under crowded conditions, which is beneficial for their usage in intracellular imaging studies.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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