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

Longitudinal NMR relaxation of ²⁷Al nuclei in zeolites

J HAASE, H PFEIFER, W OEHME, J KLINOWSKI

– Chemical Physics Letters

(1988)

150,

189

(doi: 10.1016/0009-2614(88)80025-3)

Longitudinal n.m.r. relaxation of aluminium-27 in zeolites is governed by quadrupole interactions with adsorbed polar molecules and exchangeable cations

J HAASE, H PFEIFER, W OEHME, J KLINOWSKI

– Journal of the Chemical Society, Chemical Communications

(1988)

1142

(doi: 10.1039/c39880001142)

Solid-state NMR studies of the geometry of brønsted acid sites in zeolitic catalysts

D FREUDE, J KLINOWSKI, H HAMDAN

– Chemical Physics Letters

(1988)

149,

355

(doi: 10.1016/0009-2614(88)85107-8)

Recent Advances in Solid-State NMR of Zeolites

J KLINOWSKI

– Annual Review of Materials Research

(1988)

18,

189

(doi: 10.1146/annurev.ms.18.080188.001201)

Quadrupole nutation 27Al NMR studies of isomorphous substitution of aluminium in the framework of zeolite Y

PP MAN, J KLINOWSKI

– Chemical Physics Letters

(1988)

147,

581

(doi: 10.1016/0009-2614(88)80272-0)

The structure and Si,Al distribution of the ultramarines

SE TARLING, P BARNES, J KLINOWSKI

– Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials

(1988)

44,

128

(doi: 10.1107/S0108768187011698)

Magic-angle-spinning NMR shows the aluminosilicate framework of ultramarine to be disordered

J KLINOWSKI, SW CARR, SE TARLING, P BARNES

– Nature

(1987)

330,

(doi: 10.1038/330056a0)

Structural and catalytic consequences of isomorphorus substitution of silicon by aluminium and vice versa in the framework of pentasil zeolites

B SULIKOWSKI, J RAKOCZY, H HAMDAN, J KLINOWSKI

– Journal of the Chemical Society, Chemical Communications

(1987)

1542

(doi: 10.1039/C39870001542)

ISOMORPHOUS SUBSTITUTION OF FRAMEWORK SILICON BY ALUMINUM IN SILICALITE - FACTORS DETERMINING RESOLUTION OF SI-29 MAGIC-ANGLE-SPINNING NMR-SPECTRA OF PENTASIL ZEOLITES

H HAMDAN, J KLINOWSKI

– Chemical Physics Letters

(1987)

139,

576

(doi: 10.1016/0009-2614(87)87345-1)

Solid-state NMR studies of framework defects in thermally treated zeolite Ca-A

D FREUDE, J HAASE, J KLINOWSKI

– Chemical Physics Letters

(1987)

133,

491