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Published Online November 29, 2002
Science DOI: 10.1126/science.1078239

Reports

Submitted on September 9, 2002
Accepted on November 18, 2002

Isolation and Structure of Higher Diamondoids, Nanometer-Sized Diamond Molecules

J. E. Dahl 1, S. G. Liu 1, R. M. K. Carlson 1*

1 ChevronTexaco, Post Office Box 1627, Richmond, CA 94802, USA.

* To whom correspondence should be addressed. E-mail: Bobcarlson{at}ChevronTexaco.com.

We exploited the exceptional thermal stability and diverse molecular shapes of higher diamondoids (C22 and higher polymantanes) to isolate them from petroleum. Molecules containing 4 to 11 diamond-crystal cages were isolated and crystallized, and we obtained single-crystal X-ray structures for representatives from three families. Rigidity, strength, remarkable assortments of 3-dimensional shapes, including resolvable chiral forms, and multiple, readily derivatizable attachment sites make them valuable nanometer-size molecular building blocks.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)