| Arnold M. Guloy |
| Associate Professor |
 |
Office: 108 SR-1
Phone: (713) 743-2792
Email: aguloy@uh.edu
Education
B.S., University of the Philippines, 1985
Ph.D., Iowa State University, 1991
IBM Postdoctoral Fellow, IBM TJ Watson Research Center, 1992-1993
Honors, Fellowships, etc.
NSF Early Faculty CAREER Award (1998-2002)
Philippine Department of Science and Technology
1997 DOST-ESEP Visiting Scientist Award
Homepage
|
| Research Interests |
Our
research can be described as syntheses and characterization of crystalline
solid materials with novel structures and unique properties. Our group
has embarked on exploring three relatively uncharted areas, namely;
a) crystalline organic-inorganic hybrid compounds, b) polar intermetallics
and Zintl phases, and c) soluble Zintl anions.
The
synthesis and characterization of crystalline organic-inorganic hybrid
materials is motivated by the expectation that one can modulate and
design crystalline hybrid materials that combine (synergism) or enhance
properties associated with the functional inorganic and organic components.
These organic-inorganic crystalline materials exhibit tunable properties
associated with the structural and electronic 'flexibility' of the
inorganic and organic moieties. The remarkable materials offer useful
model systems for understanding the chemistry and physics of low-dimensional
materials, particularly their electronic, optical and superconducting
properties.
A
virtual gold mine of remarkable stoichiometries, unprecedented structures,
novel chemical bonding, and potential functional materials is to be
found through synthetic explorations of polar intermetallics and Zintl
phases. The underdeveloped chemistry of intermetallics and their unpredictable
phase stabilities offers a serious challenge to solid state chemists.
Our work on intermetallics, using careful synthesis and characterization,
and the application of viable theoretical models, is part of the overall
attempt to understand the structure-property-chemical bonding relationships
in solid materials.
The
polar intermetallic examples we have discovered among the silicides
and post transition metals (Ge, Sn, Pb, Ga, especially In) range from
normal Zintl phases to "unsaturated" inorganic p-systems
such as isolated cyclopropenium-analog [In3]5-
trimer, infinite chains of allyl-like [In=In-Ge]6- anions,
and [Ni(Si3)]4- metallocene-like polymers. Moreover,
we have obtained other complex polar intermetallics that feature oligomers
to metallic sheets that behave as two-dimensional metals, and novel
three-dimensional anion networks. Our investigations also involve
the reactivity of Zintl phases - chemistry of soluble Zintl anions.
This is motivated by our aim to develop viable chemical routes to
the growth of molecular 'bare' clusters to large semiconductor clusters
and well-defined nanophases. The reactivity of soluble Zintl phases
has provided well-crystallized materials that feature polyhedral Ge92-
anion clusters, oligomers as well as the unprecedented
polymeric [Ge9]2- anion.
|
| Recent Publications |
|
"Synthesis and crystal structure of new organic-based layered perovskites with
2,2'-biimidazolium cations" Z. Tang, J. Guan, A. M. Guloy J.
Mater. Chem., 11, 479 (2001).
"An Unprecedented [Ge9]2- Polymer:
A Link between Molecular Zintl Clusters and Solid State Phases"
C. Downie, Z. Tang, A.M. Guloy Angew. Chemie. Int. Ed. Engl.,
39, 338 (2000).
"Ba2NiSi3 - A One-Dimensional
Solid State Metallocene Analog" J. Goodey, J.-G. Mao and A.M.
Guloy J. Am. Chem. Soc., 122, 10478 (2000).
"a - [NH3(CH2)5NH3
]SnI4: A New Layered Perovskite Structure" J.
Guan, Z. Tang and A.M. Guloy J. Chem. Soc. Chem. Comm., 1833
(1999).
"A Methylviologen Lead(II) Iodide: Novel [PbI3]-
Chains with Mixed Octahedral and Trigonal Prismatic Coordination"
Z. Tang and A.M. Guloy J. Am. Chem. Soc., 121, 452
(1999).
"Crystal Structure and Vibrational
Spectra of a New Viologen Gold(I) Iodide" Z. Tang, A.
P. Litvinchuk, H.-G. Lee and A.M. Guloy Inorg. Chem., 37,
4752 (1998).
"Ca5In9 Sn6 -
An Unusual Intergrowth Structure Between Intermetallic and Zintl
Phases" Z. Xu and A.M. Guloy J. Am. Chem. Soc.,
120, 7349 (1998).
"Synthesis, Structure and Bonding of SrCa2In2Ge:
A New Zintl Phase with an Unusual Inorganic p-System" Z.
Xu and A.M. Guloy J. Am. Chem. Soc., 119, 10541 (1997).
"Conducting Layered Organic-Inorganic Halides
Containing <110> Perovskite Sheets" D.B. Mitzi, S. Wang,
C.A. Feild, C.A. Chess and A.M. Guloy Science, 267,
1473 (1995).
|
|
|
