http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/7 2026-04-24T12:43:43Z http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/430 Crystallization of zinc azole complex incorporated Strandberg-type cluster-based solids: Synthesis, structure and photoluminescence studies Radhakrishnan, Raji Chorenjeth; Joseph, Jisha; Jadon, Manisha; Kuriakose, Memsy; Thomas, Jency Two new zinc azole complexes incorporated Strandberg-type cluster-based solids, namely (Hpz)6{Zn(pz)4(H2O)2}[{Zn(pz)2P2Mo5O23}2]8H2O (1) and (Himi)4{Zn(imi)3P2Mo5O23}7H2O (2) were crystallized using isomeric azole ligands, i.e., pyrazole (pz) and imidazole (imi), respectively. While solid 1 crystallized in triclinic system with space group P-1 with cell parameters a = 9.5647(15), b = 12.558(2), c = 20.340(3) A˚ , a = 75.907(7), b = 84.727(6), c = 87.525(7), Z = 1; 2 crystallized in orthorhombic system with space group P212121 having cell parameters a = 12.048(3), b = 19.561(5), c = 20.732(5) A˚ , Z = 4. Both pyrazole and imidazole can form a complex with zinc centres to form an extended solid in 1 and a derivatized Strandberg-type cluster in 2. Interestingly, 1 is a new supramolecular isomer of previously reported solid viz., (pz)[{Zn(pz)3}3{P2Mo5O23}]2H2O and 2 is the only example wherein a zinc imidazole complex has derivatized a Strandberg-type cluster. Detailed structure analysis of 1 and 2 was carried out, and the role of tectons in dictating the self-assembly of these solids was evaluated. In addition, a solid-state photoluminescence study was carried out for 1 and 2 at room temperature. 2024-04-01T00:00:00Z http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/280 Crystal engineering of molecular to nonmolecular metal malonates in presence of piperazine: Role of metal ions in tuning architectures Kaustubh R Mote; Jency Thomas; Arunachalam Ramanan Growth of transition metal malonate (mal) based solids from aqueous solution is investigated in the presence of piperazine (pip). Reaction under ambient conditions favored the growth of [{M(mal) 2 (H 2 O) 2 } {H 2 pip}] (M: Ni, 1; M: Co, 2), [{Gi(mal) 2(H 2 O) 2 }{H 2 pip}].2H 2 O (3), and, [Zn(mal)(pip)(H 2 O)] (4). While 1-3 are molecular solids, 4 is a'2-D coordination polymer. In the case of cobalt, higher acidic condition favored the formation of a molecular organic-inorganic salt, [(H 2 pip){CoCl 4 }] (5). The same reaction under a different crystallization condition, i.e., lesser polar solvent and slightly higher temperature (solvothermal) led to a 2-D coordination polymer [{Co(mal)(H 2 O)(Hpip)}]Cl (6). A retrosynthesis approach has been employed to interpret the crystallization reaction and compare the supramolecular reactivity of aggregating metal tectons in engineering the molecules to form either a molecular solid or coordination polymer. 2018-08-01T00:00:00Z http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/124 What Triggers Supramolecular Isomerism in Nonmolecular Solids? A case study of Copper Pyridazine Halides Thomas, Jency; Ramanan, Arunachalam Molecular recognition and aggregation occurring in solution are critical events towards the nucleation and growth of a crystal. However, controlling aggregation towards a particular supramolecular assembly is difficult due to lack of information on its thermodynamics and kinetics. Hence, the occurrence of supramolecular isomers is hardly recognized. In this paper, therefore, we demonstrate a retrosynthetic analysis to interpret the occurrence of isostructures and supramolecular isomers and predict the possibility of new phases in copper halide-pyridazine-H 2O system. A significant feature of this paper is the use of crystal engineering tools, namely, synthons and tectons to interpret the phase diagram of a system. The structure-synthesis correlation discussed here provides chemical insight to evolve a synthetic protocol to interpret and predict the possibility of supramolecular isomers in metal organic solids. Graphical Abstrac [CuII(pdz)X2], 1–2; [Cu2I(pdz)X2], 3-5; [CuI(pdz)X], 6–8 and [Cu2I(pdz)3Cl2].3H2O, 9 where pdz = pyridazine, were crystallized from aqueous solution for the first time and their structure elucidation was carried out using X-ray crystallographic techniques. Growth of isostructures and supramolecular isomers in 1–9 has been interpreted in terms of tectons (I–III). 2016-11-01T00:00:00Z http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/105 Role of supramolecular interactions in crystal packing of Strandberg-type cluster-based hybrid solids Joseph, Jisha; Winson, Cinu; Singh, Bharti; Jose, Jemini; Thomas, Jency JT thanks UGC for research project 2243-MRP/15-16/KLCA019/UGC-SWRO. The authors acknowledge DST and UGC for FIST and CPE program respectively implemented in St. Thomas College (Autonomous), Thrissur. The authors wish to thank Department of Chemistry, IIT Delhi for providing smart apex CCD single-crystal X-ray diffractometer under FIST for collecting data of Solid 1. The authors also acknowledge Sophisticated Test and Instrumentation Centre (STIC), Cochin University for availing Single crystal XRD facility for collecting data of Solid 2, scanning electron microscopy, CHN analyses and thermogravimetric analysis. 2020-10-07T00:00:00Z