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S Sarkar

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Featured researches published by S Sarkar.

Angewandte Chemie | 1999

Archimedean Synthesis and Magic Numbers: “Sizing” Giant Molybdenum-Oxide-Based Molecular Spheres of the Keplerate Type

Achim Müller; Sabyasachi Sarkar; Syed Qaiser Nazir Shah; Hartmut Bögge; Marc Schmidtmann; S Sarkar; Paul Kögerler; Björn Hauptfleisch; Alfred X. Trautwein; Volker Schünemann

Pythagorean harmony can be found in the spherical polyoxometalate clusters described here (see illustration for an example of a structure), since there are interesting relationships between the so-called magic numbers (12, 32, 42, 72, 132) relevant for spherical viruses and the number of the building blocks in the cluster. The size of these Keplerate clusters can be tailored by varying the type of connections between the pentagons by means of different spacers.

Angewandte Chemie | 2000

Linking Icosahedral, Strong Molecular Magnets {Mo} to Layers—A Solid‐State Reaction at Room Temperature

Achim Müller; Erich Krickemeyer; Samar K. Das; Paul Kögerler; Sabyasachi Sarkar; Hartmut Bögge; Marc Schmidtmann; S Sarkar

The by no means trivial, solid-state reaction for the condensation of {(Mo)Mo 5 } 12 Fe 30 giant spheres commences through the water ligands and leads to oxo (or hydroxo) bridging. As the discrete icosahedral units approach each other, their oxygen atom bridges ultimately form covalent bonds (Fe-Fe 3.79 A , see picture) to result in a symmetric layered structure.

Angewandte Chemie | 1999

Archimedische Synthese und magische Zahlen: Größenvariation von Molybdän‐Sauerstoff‐Riesenkugeln vom Keplerattyp

Achim Müller; Sabyasachi Sarkar; Syed Qaiser Nazir Shah; Hartmut Bögge; Marc Schmidtmann; S Sarkar; Paul Kögerler; Björn Hauptfleisch; Alfred X. Trautwein; Volker Schünemann

Zeitschrift für anorganische und allgemeine Chemie | 1983

Darstellung, Redox-Verhalten und Strukturen einkerniger „einfacher” Mono- und Dinitrosyl-Komplexe des Molybdäns mit Hydroxylamido(−1)-, Oximato-, Halogeno- und Pseudohalogeno-Liganden

Achim Müller; Werner Eltzner; S Sarkar; Hartmut Bögge; Pj Aymonino; N. Mohan; U Seyer; P Subramanian

Angewandte Chemie | 2000

Vernetzung ikosaedrischer starker molekularer Magnete {MoFe} zu Schichten – eine Festkörperreaktion bei Raumtemperatur

Achim Müller; Erich Krickemeyer; Samar K. Das; Paul Kögerler; Sabyasachi Sarkar; Hartmut Bögge; Marc Schmidtmann; S Sarkar

Zeitschrift für anorganische und allgemeine Chemie | 1988

Nitrosylierte Heterometallkomplexe mit bemerkenswerter Elektronenstruktur: Darstellung, Kristallstrukturen und spektroskopische Charakterisierung von R2[Fe(WS4)2(NO)], R2[Fe(WS4)(NO)2], R2[Co(WS4)2(NO)] und R[Co(WS4)(NO)2] (R = PPh4)

Achim Müller; P Stolz; Hartmut Bögge; S Sarkar; Klaus Schmitz; A Fangmeier; H Buker; W Twistel

Inorganica Chimica Acta | 1980

Preparation and crystal structure of K3[Mo(NO)(C2O4)3]·4H2O. On pentagonal bipyramidal complexes with {MoNo}4 configuration with simple ligands

Achim Müller; S Sarkar; N. Mohan; Rg Bhattacharyya

Zeitschrift für anorganische und allgemeine Chemie | 1978

Einfache Darstellungsmethoden des einzigen bekannten Perthiometallats [(S2)2 Mo(S2)2Mo(S2)2]2−. Zur Kenntnis der Einheit {Mo2(S2)2}6+

Achim Müller; S Sarkar; Rg Bhattacharyya

Angewandte Chemie | 2000

Linking icosahedral, strong molecular magnets {(Mo72Fe30III)-Fe-VI} to layers - A solid-state reaction at room temperature

Achim Müller; Erich Krickemeyer; Samar K. Das; Paul Kögerler; S Sarkar; Hartmut Bögge; Marc Schmidtmann

Zeitschrift Fur Naturforschung Section B-a Journal of Chemical Sciences | 1980

Identification of a doubly bridging MoS 4 2- Ligand between Fe-centers by the resonance Raman effect and simple preparation of [(C 6 H 5 ) 4 P] 2 [C l2 FeS 2 MoS 2 FeC l2 ]

Achim Müller; S Sarkar; Am Dommrose; Rr Filgueira

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Achim Müller

Bielefeld University

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Hartmut Bögge

Bielefeld University

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Marc Schmidtmann

University of Oldenburg

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Paul Kögerler

RWTH Aachen University

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Sabyasachi Sarkar

Indian Institute of Engineering Science and Technology

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Erich Krickemeyer

Bielefeld University

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Samar K. Das

University of Hyderabad

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Alfred X. Trautwein

University of Lübeck

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N. Mohan

Technical University of Dortmund

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Volker Schünemann

Kaiserslautern University of Technology

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