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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Steele, Ian M. Kumar, Sanjay Saha, Rajat Roy, Madhusudan Dey, Sanjoy Kumar Sen, Arijit Ghosh, Ashutosh Biswas, Susobhan Dey, Kamalendu |
| Description | Country affiliation: India Author Affiliation: Saha R ( Department of Physics, Jadavpur University, Kolkata 700032, India.); Biswas S ( Department of Physics, Jadavpur University, Kolkata 700032, India.); Dey SK ( Department of Physics, Jadavpur University, Kolkata 700032, India); Sen A ( Department of Physics, Jadavpur University, Kolkata 700032, India.); Roy M ( Applied Material Science Division, SINP, Kolkata 700064, India.); Steele IM ( Department of the Geophysical Sciences, The University of Chicago, USA.); Dey K ( Department of Chemistry, University of Kalyani, Kalyani, Nadia, India. Electronic address: kdey_chem.@rediffmail.com.); Ghosh A ( Department of Chemistry, University of Calcutta, Kolkata 700009, India. Electronic address: ghosh_59@yahoo.com.); Kumar S ( Department of Physics, Jadavpur University, Kolkata 700032, India. Electronic address: kumars@phys.jdvu.ac.in.) |
| Abstract | The robust complex [La(1,10-phen)2(NO3)3] (1,10-phen=1,10-phenanthroline) exhibits thermally induced single crystal to single crystal transformation from one polymorphic phase to another. The complex crystallizes in monoclinic C2/c space group with C2 molecular symmetry at 293K while at 100K it shows P21/c space group with C1 molecular symmetry. Supramolecular investigation shows that at 100K the complex forms 2D achiral sheets whereas at 293K forms two different homochiral 2D sheets. Low temperature DSC analysis indicates that this structural transformation occurs at 246K and also this transformation is reversible in nature. We have shown that thermally induced coherent movement of ligands changes the molecular symmetry of the complex and leads to polymorphism. Photoluminescence property of complex has been studied in both solid state and in methanolic solution at room temperature. The effect of the presence low-lying LUMO orbital of π-character in the complex is elucidated by theoretical calculation using DFT method. |
| ISSN | 13861425 |
| Volume Number | 130 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-09-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Crystallography, X-ray Phenanthrolines Chemistry Calorimetry, Differential Scanning Crystallization Fluorescence Hot Temperature Hydrogen Bonding Imaging, Three-dimensional Ligands Luminescence Molecular Conformation Nitrates Normal Distribution Phase Transition Photochemistry Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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