Yusuf Hamied Department of Chemistry

Professor Jacek Klinowski

Our main interest is in the relationship between the structure and properties of solids. We study the geometric reasons for the chemical activity of solids and the relationship between local order and physical properties, using mathematical techniques and computer graphics. We use solid-state nuclear magnetic resonance spectroscopy (NMR) to examine molecular sieves, minerals, layered materials, fullerenes, ceramics and biological materials.

The G minimal surface divides space into two interpenetrating labyrinths (coloured red and green).

Specific projects:

Periodic minimal surfaces (surfaces with zero mean curvature), which appear in a variety of inorganic, organic and biological structures, and the associated mathematical problems.
Morphogenesis (the origin of shape and form).
Systematic enumeration of crystalline networks using mathematical tiling theory.
Graphite, graphite oxide and graphene.
Synthesis and characterization of microporous and mesoporous molecular sieves.
Synthesis and characterization of metal-organic frameworks (MOFs).

Selected Publications

Hypothetical zeolitic frameworks: In search of potential heterogeneous catalysts. J. Phys. Chem. 112, 1040 (2008)

Low-temperature thermal decomposition of large single crystals of ammonium perchlorate. Chem. Phys. Lett. 454, 233 (2008)

Simulating self-assembly of ZnS nanoparticles into mesoporous materials. J. Am. Chem. Soc. 128, 15283 (2006)

Cross-polarization in the solid state. A guide for chemists. Chem. Rev. 102, 613 (2002)

Synthesis and characterization of a new layered compound of trimesic acid. New Journal of Chemistry 26, 381 (2002)

Exact computation of the triply periodic G ('gyroid") minimal surface. Chem. Phys. Lett. 321, 363 (2000)

Systematic enumeration of crystalline networks. Nature 400, 644 (1999)

Structural studies of tabasheer, an opal of plant origin. Phil. Mag. A 77, 201 (1998)

Structure of graphite oxide revisited. J. Phys. Chem. B102, 4477 (1998)

Solid-state NMR studies of fullerene C₆₀/benzene solvates. J. Phys. Chem. B101, 117 (1997)

New rapidly convergent series representations for z (2 n + 1). Proc. Am. Math. Soc. 125, 1263 (1997)

Directing the pore dimensions in the mesoporous molecular sieve MCM-41. Chem. Phys. Lett. 263, 247 (1996)

Taboo Search: an approach to the multiple-minima problem. Science, 267, 664 (1995)

Publications

Ordering in the framework of a magnesium aluminophosphate molecular sieve

PJ BARRIE, J KLINOWSKI

– The Journal of Physical Chemistry

(2002)

93,

5972

(doi: 10.1021/j100353a007)

Spectroscopic Studies of Protonated Aromatic Species and Radical Cations in H+-Zeolites

XS LIU, KK IU, JK THOMAS, HY HE, J KLINOWSKI

– Journal of the American Chemical Society

(2002)

116,

11811

(doi: 10.1021/ja00105a022)

Thermal stability of structural aluminum in the mesoporous molecular sieve MCM-41

ZH LUAN, CF CHENG, HY HE, J KLINOWSKI

– The Journal of Physical Chemistry

(2002)

99,

10590

(doi: 10.1021/j100026a023)

Structural defects cause different rates of phase transformation of the molecular sieves TBA-VPI-5 and DPA-VPI-5 into AlPO4-8

HY HE, TL BARR, J KLINOWSKI

– The Journal of Physical Chemistry

(2002)

98,

8775

(doi: 10.1021/j100086a030)

ESCA STUDIES OF FRAMEWORK SILICATES WITH THE SODALITE STRUCTURE .1. COMPARISON OF PURELY SILICEOUS SODALITE AND ALUMINOSILICATE SODALITE

B HERREROS, HY HE, TL BARR, J KLINOWSKI

– The Journal of Physical Chemistry

(2002)

98,

1302

(doi: 10.1021/j100055a042)

Applications of magic-angle-spinning silicon-29 nuclear magnetic resonance. Evidence for two different kinds of silicon-aluminum ordering in zeolitic structures

J KLINOWSKI, JM THOMAS, CA FYFE, JS HARTMAN

– Journal of Physical Chemistry

(2002)

85,

2590

(doi: 10.1021/j150618a003)

SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF THE ALUMINOPHOSPHATE MOLECULAR-SIEVE DPA-VPI-5

XS LIU, HY HE, J KLINOWSKI

– Journal of Physical Chemistry

(2002)

95,

9924