Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/81254
Title: The mixed metal cluster (n-Bu4N)2[MoCu3OS3(NCS) 3]: the first example of a nest-shaped compound with large third-order polarizability and optical limiting effect
Authors: Shi, S. 
Ji, W. 
Xie, W. 
Chong, T.C. 
Zeng, H.C. 
Lang, J.P.
Xin, X.Q.
Keywords: Mixed metal nido-clusters
Optical limiting effect
Polarizability
Issue Date: 31-Jan-1995
Source: Shi, S.,Ji, W.,Xie, W.,Chong, T.C.,Zeng, H.C.,Lang, J.P.,Xin, X.Q. (1995-01-31). The mixed metal cluster (n-Bu4N)2[MoCu3OS3(NCS) 3]: the first example of a nest-shaped compound with large third-order polarizability and optical limiting effect. Materials Chemistry & Physics 39 (4) : 298-303. ScholarBank@NUS Repository.
Abstract: A mixed metal nido-cluster, (n-Bu4N)2[MoCu3OS3(NCS) 3], was discovered to exhibit large third-order polarizability (γ) and optical limiting effect. This is the first example of a nest-shaped compound with large nonlinear optical coefficients. The magnitude of the third-order polarizability, |γ|= 4.8 × 10-29 esu, was determined with 7-ns laser pulses of 532 nm wavelength by a degenerate four-wave mixing technique. An irradiance-dependent transmission measurement was conducted to assess the contribution of nonlinear absorption to the γ value. These results, in combination with those of a Z-scan experiment, yielded a negative value for the real part of γ, Reγ = -4.8 × 10-29 esu. The negative sign of Reγ reveals that the nido-cluster has an interesting optical self-defocusing property. The optical limiting effect of the cluster was also demonstrated. © 1995.
Source Title: Materials Chemistry & Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/81254
ISSN: 02540584
Appears in Collections:Staff Publications

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