研究领域

Inorganic Chemistry

One project deals with the synthesis of solids containing confined transition-metal-oxide frameworks. The primary objective is to survey new solids that are of fundamental importance for experimental and theoretical studies of spin interactions. Current research also involves the study of solids as molecular magnets for device applications. The second project studies electrochemical synthesis of conducting solids in nonaqueous media. The goal is to develop a highly efficient, bench-top synthetic method that can facilitate a controlled synthesis, with a possibility by design, of solid state materials. The scope is to explore novel solids possessing unusual electronic properties, including superconductivity. The third area of materials research is on the synthesis of a new class of hybrid materials via salt inclusion. The resulting solids exhibit a composite framework of mixed covalent and ionic lattices. The current interest is to seek parameters that govern the formation of nanometer-sized transition metal (TM) oxide lattices of desired size, geometry and shape.

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Cs2Al2P2O9: An Exception to Löwenstein's Rule. Synthesis and Characterization of a Novel Layered Aluminophosphate Containing Linear Al-O-Al Linkages, Q. Huang and S.-J. Hwu, Chem. Comm., 1999, 23, 2343-4. DOI: 10.1039/a907194f Structural Analysis of Sr8Ga16Ge30 Clathrate Compound, S. B. Schujman, G. S. Nolas, R. A. Young, C. Lind, A. P. Wilkinson, G. A. Slack, R. Patschke, M. G. Kanatzidis, M. Ulutagay, S.-J. Hwu, J. Appl. Phys., 2000, 87, 1529-1533. DOI:10.1063/1.372044 Vacancy Ordering Transitions in One-Dimensional Lattice Gas with Coulomb Interactions, T. C. King, Y. K. Kuo, M. J. Skove, S.-J. Hwu, Phys. Rev. B, 2001, 63, 45405/1-45405/8. DOI High-Temperature Synthesis of an Open-framework Compound, Na2Cs2Cu3(P2O7)2Cl2 (CU-4), via Molten-Salt Methods, Q. Huang, S.-J. Hwu, X. Mo, Angew. Chem., Int. Ed. Engl., 2001, 40, 1690-3. DOI High-Temperature Synthesis of Two New Aluminophosphates, NaRb2Al2(PO4)3 and NaCs2Al(PO4)2, in Molten Alkali Metal Chloride Media, Q. Huang, and S.-J. Hwu, Chem. Mater., 2001, 13, 1794-9. DOI: 10.1021/cm000915c High-Temperature Synthesis of Rb2MnP2S6 in Molten Salt Medium, Stephen P. Taylor, Mariusz Krawiec, S.-J. Hwu, Acta Crystallogr., 2002, C58, i27-i28. DOI:10.1107/S0108270101018017 Synthesis, Structure, and Magnetic Properties of Two Quasi-Low-Dimensional Antiferromagnets, NaMnAsO4 and b-NaCuPO4, Mutlu Ulutagay-Kartin, Kristen M. S. G. Etheredge, George L. Schimek, Shiou-Jyh Hwu, Journal of Alloys and Compounds, invited paper, 2002, 338, 80-86. DOI Magnetic Properties of the Low-Dimensional Cuprate Na5RbCu4(AsO4)4Cl2, J. A. Clayhold, M. Ulutagay-Kartin, S.-J. Hwu, H.-J. Koo, M.-H. Whangbo, A. Voigt, K. Eaiprasertsak, Phys. Rev. B. 2002, 66, 052403/1-052403/4. DOI A New Class of Hybrid Materials via Salt Inclusion: Novel Copper(II) Arsenates Na5ACu4(AsO4)4Cl2 (A = Rb, Cs) Composed of Alternating Covalent and Ionic Lattices, Shiou-Jyh Hwu, M. Ulutagay-Kartin, Jeffrey A. Clayhold, Richard Mackay, Tina A. Wardojo, Charles T. O'Connor, Mariusz Krawiec, J. Am. Chem. Soc., 2002, 124, 12404-12405. DOI: 10.1021/ja026008l The Fascinating Non-centrosymmetric Copper(II) Phosphates Synthesized via CsCl Salt-Inclusion, Q. Huang, S.-J. Hwu, Inorg. Chem., 2003, 42, 655-657. DOI: 10.1021/ic026060i Synthesis of a New Class of Hybrid Solids via Salt Inclusion, Q. Huang, M. Ulutagay-Kartin, X. Mo, and S.-J. Hwu, Mat. Res. Soc. Symp. Proc. Vol. 755, DD12.4.1 (2003). Nanostructured Magnetic Cuprate Cluster. Synthesis, Structure, UV-vis and Magnetic Properties of a New Copper(II) Arsenate NaCuAsO4 Containing Discrete [Cu4O16]24- Clusters, M. Ulutagay-Kartin, S.-J. Hwu, Jeffrey A. Clayhold, Inorg. Chem., 2003, 42, 2405-2409. DOI: 10.1021/ic026169q Salt-Inclusion Synthesis of Ba2MnSi2O7Cl. A Fresnoite-type Polar Framework Containing Acentric [Si2O7]6- Polyanion in the Anti-ReO3 Type [(Ba2Mn)Cl]6+ Cage, X. Mo, S.-J. Hwu, Inorg. Chem., 2003, 42, 3978-3980. DOI: 10.1021/ic0342245 Salt-Inclusion Synthesis of Two New Polar Solids Ba6Mn4Si12O34Cl3 and Ba6Fe5Si11O34Cl3, X. Mo, E. Ferguson, S.-J. Hwu, Inorg. Chem., 2005, 44, 3121-3126. DOI: 10.1021/ic050228t Synthesis, Structure and Property Characterization of A New Family of Mixed-Framework Chalcohalides: CdSbS2X (X = Cl, Br), CdBiS2X (X = Cl, Br), CdBiSe2X (X = Br, I), Lei Wang, Yi-Chung Hung, Shiou-Jyh Hwu, Hyun-Joo Koo, and M.-H. Whangbo Chem. Mater., 2006, 18 (5), 1219 -1225. DOI: 10.1021/cm0522230 New Cuprates Featuring Ladderlike Periodic Arrays of [Cu3O8]10- Trimeric Magnetic Nanostructures, Mo, X.; Etheredge, K. M. S.; Hwu, S.-J.; Huang, Q. Inorg. Chem.; (Communication); 2006; 45(9); 3478-3480. DOI: 10.1021/ic060292q Synthesis, Structure, and Magnetic Properties of Cs2-xRbxCu3P4O14 (0.0 < x < 0.8): A New Series of Copper(II) Phosphates Containing Periodic Arrays of Staggered Square-Planar CuO4 Trimers, Sanjaya Ranmohotti, K. G.; Mo, X.; Smith, M. K.; Hwu, S.-J. Inorg. Chem.; (Article); 2006; 45(9); 3665-3670. DOI: 10.1021/ic060069t Hydrothermal Ion Exchange on Submillimeter-Size Single Crystals of a New Iron(III) Phosphate, Greg Becht and Shiou-Jyh Hwu, Chem. Mater., 2006, 18 (18), 4221 -4223 (Communication). DOI: 10.1021/cm0607482 A Low-Dimensional Iron(II) Phosphate Exhibiting Field-Dependent Magnetization Steps, Wendy L. Queen, Shiou-Jyh Hwu, Dr. , Lei Wang, Angew. Chem., Int. Ed. Engl., 2007, 46, 5344-7. DOI A New Series of Chalcohalide Semiconductors with Composite CdBr2/Sb2Se3 Lattices: Synthesis and Characterization of CdSb2Se3Br2 and Indium Derivatives InSb2S4X (X = Cl and Br) and InM2Se4Br (M = Sb and Bi), Lei Wang and Shiou-Jyh Hwu, Chem. Mater. 2007, 19 (25), 6212–6221 10.1021/cm701995d The Versatile Chemistry and Noncentrosymmetric Crystal Structures of Salt-Inclusion Vanadate Hybrids, Wendy L. Queen, J. Palmer West, Shiou-Jyh Hwu, Donald G. VanDerveer, Matthew C. Zarzyczny, Ryan A. Pavlick, Angew. Chem., Int. Ed. Engl., 2008, April 9