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Jana G, Jha R, Pan S, Chattaraj PK. Microsolvation of lithium–phosphorus double helix: a DFT study. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2462-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chakraborty D, Chattaraj PK. Bonding, Reactivity, and Dynamics in Confined Systems. J Phys Chem A 2019; 123:4513-4531. [DOI: 10.1021/acs.jpca.9b00830] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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53
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Mondal P, Jana G, Behera PK, Chattaraj PK, Singha NK. A new healable polymer material based on ultrafast Diels–Alder ‘click’ chemistry using triazolinedione and fluorescent anthracyl derivatives: a mechanistic approach. Polym Chem 2019. [DOI: 10.1039/c9py00499h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Development of a new healable polymer based on ultrafast Diels–Alder ‘click’ chemistry using fluorescent anthracyl and TAD derivatives. The ultrafast mechanistic approach is rationalized via Density Functional Theory (DFT) study.
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Pal R, Jana G, Sural S, Chattaraj PK. Hydrophobicity versus electrophilicity: A new protocol toward quantitative structure-toxicity relationship. Chem Biol Drug Des 2018; 93:1083-1095. [DOI: 10.1111/cbdd.13428] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/08/2018] [Accepted: 10/18/2018] [Indexed: 11/30/2022]
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55
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Chakraborty D, Chattaraj PK. Host-guest interactions between octa acid and cations/nucleobases. J Comput Chem 2018; 39:161-175. [PMID: 29105789 DOI: 10.1002/jcc.25097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/14/2017] [Accepted: 10/17/2017] [Indexed: 11/12/2022]
Abstract
The nature of host-guest interaction in between octa acid cavitand (OA) and some representative cationic guests (Li+ , Na+ , K+ , Be+2 , Mg+2 , Ca+2 , Li3 O+ , Na3 O+ , K3 O+ ) as well as heterocyclic moieties like [adenine (A), guanine (G), cytosine (C), thymine (T), uracil (U), and tetrathiafulvalene (TTF)] has been examined with the aid of density functional theory (DFT)-based computations. Thermochemical results indicate that all the guests bind with OA in a thermodynamically favorable fashion at 298.15 K temperature and one atmospheric pressure. OA exhibits high selectivity in binding the lighter cations/metal cluster cations as compared to the heavier congeners along each given series. Moreover, OA exhibits enhanced affinity as well as selectivity in binding A/G/TTF molecules as compared to C/T/U. Noncovalent interaction and energy decomposition analyses reveal that in addition to the van der Waals interaction, significant contribution from electrostatic as well as orbital interactions dictate the outcome in all the host-guest complexes. Time dependent DFT calculations have been carried out to assess the role of the guests in tuning the electronic properties as well as absorption spectrum of OA. © 2017 Wiley Periodicals, Inc.
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56
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Mondal S, Goswami T, Jana G, Misra A, Chattaraj PK. A possible reason behind the initial formation of pentagonal dodecahedron cavities in sI-methane hydrate nucleation: A DFT study. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.11.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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57
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Tsuneda T, Singh RK, Chattaraj PK. Diagrams for comprehensive molecular orbital-based chemical reaction analyses: reactive orbital energy diagrams. Phys Chem Chem Phys 2018; 20:14211-14222. [DOI: 10.1039/c8cp00461g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactive orbital energy diagrams resting on the reactive orbital energy theory correct conventional frontier orbital diagrams and make it possible to perform comprehensive orbital-based analyses of reactions.
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Chakraborty D, Chattaraj PK. Reactions involving some gas molecules through sequestration on Al12
Be cluster: An electron density based study. J Comput Chem 2017; 39:535-545. [PMID: 29094387 DOI: 10.1002/jcc.25092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/06/2017] [Accepted: 10/10/2017] [Indexed: 11/10/2022]
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59
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Chakraborty D, Chattaraj PK. Confinement induced thermodynamic and kinetic facilitation of some Diels-Alder reactions inside a CB[7] cavitand. J Comput Chem 2017; 39:151-160. [PMID: 29094421 DOI: 10.1002/jcc.25094] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 10/16/2017] [Indexed: 01/07/2023]
Abstract
The effect of geometrical confinement on the Diels-Alder reactions between some model dienes viz. furan, thiophene, cyclopentadiene, benzene, and a classic dienophile, ethylene has been explored by performing density functional theory-based calculations. The effect of confinement has been imposed by a rigid macrocyclic molecule cucurbit[7]uril (CB[7]). Results indicate that all the reactions become thermodynamically more favorable at 298.15 K temperature and one atmospheric pressure inside CB[7] as compared to the corresponding free gaseous state reactions. Moreover, the rate constants associated with the reactions experience manifold enhancement inside CB[7] as compared to the "unconfined" reactions. Suitable contribution from the entropy factor makes the concerned reactions more facile inside CB[7]. The energy gap between the frontier molecular orbitals of the dienes and dienophiles decrease inside CB[7] as compared to that in the free state reactions thereby allowing facile orbital interactions. The nature of interaction as well as bonding has been analyzed with the help of atoms-in-molecules, noncovalent interaction, natural bond orbital as well as energy decomposition analyses. Results suggest that all the guests bind with CB[7] in an attractive fashion. Primarily, noncovalent interactions stabilize the host-guest systems. © 2017 Wiley Periodicals, Inc.
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Chakraborty D, Chattaraj PK. Effect of functionalization of boron nitride flakes by main group metal clusters on their optoelectronic properties. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:425201. [PMID: 28809159 DOI: 10.1088/1361-648x/aa8651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The possibility of functionalizing boron nitride flakes (BNFs) with some selected main group metal clusters, viz. OLi4, NLi5, CLi6, BLI7 and Al12Be, has been analyzed with the aid of density functional theory (DFT) based computations. Thermochemical as well as energetic considerations suggest that all the metal clusters interact with the BNF moiety in a favorable fashion. As a result of functionalization, the static (first) hyperpolarizability ([Formula: see text]) values of the metal cluster supported BNF moieties increase quite significantly as compared to that in the case of pristine BNF. Time dependent DFT analysis reveals that the metal clusters can lower the transition energies associated with the dominant electronic transitions quite significantly thereby enabling the metal cluster supported BNF moieties to exhibit significant non-linear optical activity. Moreover, the studied systems demonstrate broad band absorption capability spanning the UV-visible as well as infra-red domains. Energy decomposition analysis reveals that the electrostatic interactions principally stabilize the metal cluster supported BNF moieties.
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Chakraborty D, Das R, Chattaraj PK. Does Confinement Always Lead to Thermodynamically and/or Kinetically Favorable Reactions? A Case Study using Diels-Alder Reactions within ExBox +4
and CB[7]. Chemphyschem 2017. [DOI: 10.1002/cphc.201700852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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62
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Chakraborty D, Das R, Chattaraj PK. Cover Picture: Does Confinement Always Lead to Thermodynamically and/or Kinetically Favorable Reactions? A Case Study using Diels-Alder Reactions within ExBox +4
and CB[7] (ChemPhysChem 16/2017). Chemphyschem 2017. [DOI: 10.1002/cphc.201700853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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63
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Chakraborty D, Das R, Chattaraj PK. Does Confinement Always Lead to Thermodynamically and/or Kinetically Favorable Reactions? A Case Study using Diels-Alder Reactions within ExBox+4
and CB[7]. Chemphyschem 2017; 18:2162-2170. [PMID: 28557293 DOI: 10.1002/cphc.201700308] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/29/2017] [Indexed: 11/07/2022]
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Sharma V, De D, Saha R, Das R, Chattaraj PK, Bharadwaj PK. A Cu(ii)-MOF capable of fixing CO2 from air and showing high capacity H2 and CO2 adsorption. Chem Commun (Camb) 2017; 53:13371-13374. [DOI: 10.1039/c7cc08315g] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The MOF 1 exhibits very high CO2 and H2 adsorption capacities, and can fix CO2 from air at room temperature.
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Chakraborty D, Das R, Chattaraj PK. Change in optoelectronic properties of ExBox+4 on functionalization and guest encapsulation. Phys Chem Chem Phys 2017; 19:23373-23385. [DOI: 10.1039/c7cp02433a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
High non-linear optical properties could be derived from the ExBox+4 moiety due to functionalization as well as suitable guest encapsulation.
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66
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Ghosh A, Mandal S, Chattaraj PK, Banerjee P. Ring Expansion of Donor-Acceptor Cyclopropane via Substituent Controlled Selective N-Transfer of Oxaziridine: Synthetic and Mechanistic Insights. Org Lett 2016; 18:4940-4943. [PMID: 27684195 DOI: 10.1021/acs.orglett.6b02417] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A distinctive N-substituent controlled electrophilic N-transfer of oxaziridines with donor-acceptor cyclopropanes in the presence of MgI2 is reported. Contrary to earlier reports, the oxaziridine having bulkier N-substituents can also give N-transferred product instead of the O-transferred one. Interestingly, the oxaziridines having α-H containing N-substituents lead to the pyrrolidine derivatives through [3 + 2] cycloaddition. A mechanistic reasoning for this divergent reactivity is depicted by density functional theory calculations and validated through energy decomposition analysis.
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Chakraborty D, Chattaraj PK. Optical response and gas sequestration properties of metal cluster supported graphene nanoflakes. Phys Chem Chem Phys 2016; 18:18811-27. [PMID: 27346831 DOI: 10.1039/c6cp02134d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The possibility of obtaining metal cluster (M3O(+), M = Li, Na, K) supported pristine, B-doped and BN-doped graphene nanoflakes (GR, BGR and BNGR, respectively) has been investigated by carrying out density functional theory (DFT) based calculations. Thermochemical analysis reveals the good stability of M3O(+)@GR/BGR/BNGR moieties. The dynamic stability of M3O(+)@GR/BGR/BNGR moieties is confirmed through an atom-centered density matrix propagation simulation at 298 K up to 500 fs. Orbital and electrostatic interactions play pivotal roles in stabilizing the metal-cluster supported graphene nanoflakes. The metal clusters lower the Fermi levels of the host nanoflakes and enable them to exhibit reasonably good optical response properties such as polarizability and static first hyperpolarizability. In particular, Na3O(+)/K3O(+)@BGR complexes exhibit very large first hyperpolarizability values at the static field limit. All the M3O(+)@BGR/BNGR moieties demonstrate broadband optical absorption encompassing the ultraviolet, visible as well as infrared domains. The metal-cluster supported graphene nanoflakes, in general, can sequestrate polar molecules, viz. CO, NO and CH3OH, in a thermodynamically more favorable way than GR, BGR and BNGR. In the adsorbed state, the CO, NO and CH3OH molecules, in general, attain an 'active' state as compared to their free counterparts.
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68
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Mandal S, Nandi S, Anoop A, Chattaraj PK. Viability of aromatic all-pnictogen anions. Phys Chem Chem Phys 2016; 18:11738-45. [PMID: 26745786 DOI: 10.1039/c5cp07236k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aromaticity in novel cyclic all-pnictogen heterocyclic anions, P2N3(-) and P3N2(-), and in their heavier analogues is studied using quantum mechanical computations. All geometrical parameters from optimized geometry, bonding, electron density analysis from quantum theory of atoms in molecules, nucleus-independent chemical shift, and ring current density plots support their aromaticity. The aromatic nature of these molecules closely resembles that of the prototypical aromatic anion, C5H5(-). These singlet C2v symmetric molecules are comprised of five distinct canonical structures and are stable up to at least 1000 fs without any significant distortion. Mechanistic study revealed a plausible synthetic pathway for P3N2(-) - a click reaction between N2 and P3(-), through a C2v symmetric transition state. Besides this, the possibility of P3N2(-) as a η(5)-ligand in metallocenes is studied and the nature of bonding in metallocenes is discussed through the energy decomposition analysis.
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Mondal S, Ghara M, Chattaraj PK. Hydrogen trapping potential of (HF)m (m=1–8) and (H2O)n (n=1–10) clusters. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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70
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Chakraborty D, Chattaraj PK. Interaction of BN- and BP-doped graphene nanoflakes with some representative neutral molecules and anions. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1059511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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71
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Chakraborty D, Chattaraj PK. In quest of a superhalogen supported covalent bond involving a noble gas atom. J Phys Chem A 2015; 119:3064-74. [PMID: 25733034 DOI: 10.1021/jp513018v] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The possibility of having neutral Xe-bound compounds mediated by some representative transition metal fluorides of general formula MX3 (where M=Ru, Os, Rh, Ir, Pd, Pt, Ag, Au and X=F) has been investigated through density functional theory based calculations. Nature of interaction between MX3 and Xe moieties has been characterized through detailed electron density, charge density and bond energy decomposition analyses. The feasibility of having compounds of general formula XeMX3 at 298 K has been predicted through thermodynamic considerations. The nature of interaction in between Xe and M atoms is partly covalent in nature and the orbital interaction is the dominant contributor toward these interactions as suggested by energy decomposition analysis.
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Chakraborty D, Kar S, Chattaraj PK. Orbital free DFT versus single density equation: a perspective through quantum domain behavior of a classically chaotic system. Phys Chem Chem Phys 2015; 17:31516-29. [PMID: 26033095 DOI: 10.1039/c5cp00995b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Regular to chaotic transition takes place in a driven van der Pol oscillator in both classical and quantum domains.
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73
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Sengupta S, Khatua M, Chattaraj PK. Bohmian trajectory from the "classical" Schrödinger equation. CHAOS (WOODBURY, N.Y.) 2014; 24:043123. [PMID: 25554043 DOI: 10.1063/1.4901034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The quantum-classical correspondence is studied for a periodically driven quartic oscillator exhibiting integrable and chaotic dynamics, by studying the Bohmian trajectory of the corresponding "classical" Schrödinger equation. Phase plots and the Kolmogorov-Sinai entropy are computed and compared with the classical trajectory as well as the Bohmian trajectory obtained from the time dependent Schrödinger equation. Bohmian mechanics at the classical limit appears to mimick the behavior of a dissipative dynamical system.
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74
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Das R, Chattaraj PK. Host-Guest Interactions in ExBox4+. Chemphyschem 2014; 15:4108-16. [DOI: 10.1002/cphc.201402523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/08/2014] [Indexed: 11/06/2022]
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75
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Das R, Chattaraj PK. Gas storage potential of ExBox4+and its Li-decorated derivative. Phys Chem Chem Phys 2014; 16:21964-79. [DOI: 10.1039/c4cp02199a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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