A molecular magnet confined in the nanocage of a globular protein.

A molecular magnet confined in the nanocage of a globular protein.
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限制在球状蛋白纳米笼中的分子磁体

DOI:
10.1002/cphc.200900708
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发表时间:
2010
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
Achim Müller
Achim Müller
中科院分区:
--
文献类型:
--
作者:
Samir Kumar Pal;Rajib Kumar Mitra;Pramod Kumar Verma;Dirk Wulferding;Dirk Menzel;Thom Mitra;Peter Lemmens;Achim Müller

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The effect of confinement and energy transfer on the dynamics of a molecular magnet, known as a model system to study quantum coherence, is investigated. For this purpose the well‐known polyoxovanadate [V15As6O42(H2O)]6−(V15) is incorporated into a protein (human serum albumin, HSA) cavity. Due to a huge overlap of the optical absorption spectrum of V15with the emission spectrum of a fluorescence center of HSA (containing a single tryptophan residue), energy transfer is induced and probed by steady‐state and time‐resolved fluorescence. The geometrical coordination and the distance of the confined V15to the tryptophan moiety of HSA are investigated at various temperatures. This effect is used as a local probe for the thermal denaturation of the protein at elevated temperatures.
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