Mn3+ in Trigonal Bipyramidal Coordination:

A New Blue Chromophore

Current News Releases:


J. Am. Chem. Soc., DOI:10.1021/ja9080666


New York Times


Oregon State University (Press Release)


KEZI 9 News (TV Interview)


Chemical & Engineering News (C&EN)




Andrew E. Smith1, Hiroshi Mizoguchi1, Kris Delaney2, Nicola A. Spaldin2,

Arthur W. Sleight1, and M. A. Subramanian1*


1Department of Chemistry, Oregon State University, Corvallis, OR 97331-4003, USA

2 Materials Department University of California, Santa Barbara, CA 93106, USA



Text Box: We have discovered that a surprisingly intense and bright blue color is obtained when Mn3+ is introduced into trigonal pipyramidal sites of oxides. Such sites exist in hexagonal YInO3, and substitution of Mn for In gives a blue color over much of the YIn1-xMnxO3 solid solution range, despite the fact that YInO3 and YMnO3 are white and black, respectively. We find the same blue color when Mn3+ is introduced into trigonal bipyramidal sites of other oxides, such as ScGaZnO4. This color arises from a d-d transition and is surprisingly intense due to a very short Mn-O bond. Finding durable blue pigments has been an elusive goal for centuries, and our discovery offers a potential new route to such pigments.


Subramanian Research Group

Spotlight on Research:


Science Daily


physorg (news brief)


Gazette Times (news brief)


Science360 (news brief)