[Pressure-tuning infrared spectral study on the single-molecule-magnet manganese complexes]

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[Pressure-tuning infrared spectral study on the single-molecule-magnet manganese complexes] Abstract Text:

Zhen-hua Xu,Zhi-da Chen,Ian S Butler,

The infrared spectra (IR) of single-molecule-magnet manganese complexes [Mn12O12 (O2CC6H4-3-Cl)16 (H2O)3 (3ClC6H4COH)].(3-Cl-C6H4CO2H)(I) and [Mn12O12(O2CCH2Br)16 (H2O)4]x4(CH2Cl2)(II) were studied at high external pressure. The different pressure-induced phase transition pressures were observed for both complexes (complex I, 25-29 kbar) and (complex II, 29-35 kbar). Both were second-order pressure-induced phase transition. The possible changes from higher spin to lower spin happened near the phase transition pressure following the changes of their structures when undergoing the high pressures. The average value of pressure sensitivities in the low-pressure phase is unusually smaller (0.19 cm(-1) x kbar(-1)) than in the high-pressure phase (0.29 cm(-1) x kbar(-1)) in the complex I. On the contrary, the average value of the pressure sensitivities in the low-pressure phase is higher (0.34 cm(-1) x kbar(-1)) than in the high-pressure phase (0.23 cm(-1) x kbar(-1)) in the complex II as usually, which means that the possibility of compression is lower in the high-pressure phase than in the low-pressure phase.

[Pressure-tuning infrared spectral study on the single-molecule-magnet manganese complexes] Publishing Authors By Initials

ZH Xu,ZD Chen,IS Butler,

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[Pressure-tuning infrared spectral study on the single-molecule-magnet manganese complexes] Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Guang pu xue yu guang pu fen xi = Guang pu

VOLUME: 24

Page Numbers: 663-5

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ISSN: 1000-0593

DAY: 15

MONTH: Jun

YEAR: 2004

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LANGUAGE: chi

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Grant and Affiliation Information for [Pressure-tuning infrared spectral study on the single-molecule-magnet manganese complexes]

AFFILIATION: The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

Country: China

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MEDLINETA: Guang Pu Xue Yu Guang Pu Fen X

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