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Subhasis Roy

Bio: Subhasis Roy is an academic researcher from University of Burdwan. The author has contributed to research in topics: Schiff base & Octahedral molecular geometry. The author has an hindex of 10, co-authored 24 publications receiving 194 citations.

Papers
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TL;DR: In this paper, a series of pentacoordinated mono-/dinuclear compounds, [Zn(L)(Br)]PF6 (1), Zn2(L)2(μ-tp)](ClO4/PF6)2 (3/4) [L = N,N,N′-(bis(pyridin-2-yl)benzylidene)-1,3-propanediamine, tp = Terephthalate dianion], have been synthesized using one-pot reactions of

29 citations

Journal ArticleDOI
TL;DR: In this article, three dinuclear compounds of the types [Cu2(L)2(μ-tp)](ClO4/PF6)2 (1/2) and [Mn2L2(M-tp](clO4)2 H2O (3) have been synthesized and characterized using single crystal X-ray diffraction measurements.

28 citations

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TL;DR: The gradual spin transition in ·PF6 in contrast to an abrupt spin transition with a hysteresis loop in ·ClO4 has been analysed in terms of structural factors.
Abstract: One Co(II) SCO coordination polymer [Co(enbzpy)(μ1,5-dca)]n(PF6)n (1·PF6) has been isolated and characterised structurally and magnetostructurally. The properties of 1·PF6 are compared with the reported perchlorate analogue [Co(enbzpy)(μ1,5-dca)]n(ClO4)n (1·ClO4). The gradual spin transition in 1·PF6 in contrast to an abrupt spin transition with a hysteresis loop in 1·ClO4 has been analysed in terms of structural factors.

20 citations

Journal ArticleDOI
TL;DR: A dinuclear complex, [Cu2(μ-Cl)2Cl2(pbba)2] (1) [pbba=N-((pyridin-2-yl)benzylidene)benzylamine], has been isolated from the reaction of a 1:1-M ratio of CuCl2·2H2O and pbba in MeOH solution at room temperature as mentioned in this paper.

16 citations

Journal ArticleDOI
TL;DR: In this article, a bis(monodentate) succinate bridged 1D coordination polymer [Co(bnzd) 2 (μ-suc)(OH 2 ) 2 ] n ⋅(H 2 O) n ( 1 ) (bnzdr=benzidine; suc=succinate dianion) has been isolated using a one-pot reaction of the building components, and characterized structurally and magneto-structurally.

15 citations


Cited by
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TL;DR: Molecular magnetism has travelled a long way from the pioneering studies on electron exchange and double exchange or spin crossover and valence tautomerism in small oligonuclear complexes, from mono-to di-and tetranuclear species, to the current investigations about magnetic anisotropy and spin dynamics or quantum coherence of simple mono- or large polynuclear complexes.

255 citations

Journal ArticleDOI
TL;DR: A number of switchable cobalt coordination polymers (CPs) have been constructed using polytopic nitrogen-donor linking ligands as mentioned in this paper, where the transition from low-spin to high-spin is induced by temperature variation.

75 citations

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TL;DR: Host-guest composites of Hofmann-type iron(II) spin-transition (ST) porous coordination polymers incorporating guest molecules show guest-dependent ST behavior in accordance with the respective guest species, which may be a gas, solvent, halogen, or organic molecule.
Abstract: The host-guest composites of Hofmann-type iron(II) spin-transition (ST) porous coordination polymers incorporating guest molecules show guest-dependent ST behavior in accordance with the respective guest species, which may be a gas, solvent, halogen, or organic molecule. The guest also works as a chemical stimulant to switch the spin state of the host between high and low spin at room temperature. In this review, we discuss guest properties including size, shape, flexibility, chemical properties, and pore loading content, which impact the spin states of the host framework and the ST behavior exhibited by the host-guest composites.

73 citations

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TL;DR: It was revealed that the inclusion compounds possessed significant singlet oxygen generation activity and the cluster supported on MIL-101 was shown to possess in vivo phototoxicity.

54 citations

Journal ArticleDOI
TL;DR: Two new coordination solids [Cu2(μ2-Bz)4(CH3OH)2] have been synthesized and characterized using elemental analysis, TGA, spectroscopic (IR, UV-vis-NIR and ESR) and single crystal X-ray diffraction techniques.
Abstract: Two new coordination solids [Cu2(μ2-Bz)4(CH3OH)2][Cu2(η2-Bz)2(phen)2(H2O)2]·(NO3)2 (1) and [Cu(phen)(H2O)(Bz)(η2-Bz)] (2) (phen = 1,10-phenanthroline; Bz = benzoate) have been synthesized and characterized using elemental analysis, TGA, spectroscopic (IR, UV-vis-NIR and ESR) and single crystal X-ray diffraction techniques. Change of the solvent from methanol to DMF results in changes in the architectures that are triggered by a change from square pyramidal to octahedral coordination at the divalent metal centers for complexes 1 and 2 respectively. The structural topology of the complexes is established by the interplay of strong O–H⋯O and weak C–H⋯O, C–H⋯C, π–π stacking interactions. Unconventional parallel intramolecular and anti-parallel intermolecular contacts involving the chelate rings (CR) also stabilize the structures. The energetic analyses of the structures evidence that the parallel arrangement is energetically favoured which is likely due to the presence of the Cu⋯Cu cuprophilic interaction in 1 that is not established in 2. Compound 1 exhibits the highest antibacterial activity against Rhizobium leguminosarum among the tested cultures. In vitro cytotoxicity and apoptosis studies were carried out for compounds 1 and 2 on malignant Dalton's lymphoma cell line (DL). Both compounds showed a significant effect on the decrease in cell viability as compared to a control, while compound 2 induced remarkable cytotoxicity towards DL cells. Treatment also showed the appearance of membrane blebbing, chromatin condensation and fragmented nuclei which are typical characteristic features of apoptotic cell death. Furthermore, a docking study revealed that both compounds docked in the active sites of all the cancer target proteins under study. Moreover, SAR analysis revealed that oxygen and nitrogen atoms of compound 1 and the oxygen atoms of compound 2 are crucial for biological activities.

46 citations