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Science 5 March 1993:
Vol. 259. no. 5100, pp. 1426 - 1428
DOI: 10.1126/science.259.5100.1426
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Articles

Crystal Structure and Optical Properties of Cd32S14(SC6H5)36. DMF4, a Cluster with a 15 Angstrom CdS Core

N. Herron 1, J. C. Calabrese 1, W. E. Farneth 1, and Y. Wang 1

1 Central Research and Development Department, The DuPont Company, Wilmington, DE 19880-0328

Recrystallization of the solid Cd10S4(SC6H5)12 from a solution of pyridine and N, N-di-methylformamide (DMF) results in the formation of the cluster Cd32S14(SC6H5)36-DMF4 as pale yellow cubes. The structure consists of an 82-atom CdS core that is a roughly spherical piece of the cubic sphalerite lattice sim12 angstroms in diameter. The four corners of the lattice are capped by hexagonal wurtzite-like CdS units, which results in an overall tetrahedral cluster sim15 angstroms in diameter. This cluster dissolves intact in tetrahydrofuran where its absorption spectrum reveals a sharp peak at 358 nanometers at room temperature and its emission spectra show a strong broad band at 500 nanometers.

Submitted on August 31, 1992
Accepted on December 4, 1992


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