1
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Hatua K, Das HS, Mondal A, Nandi PK. Electronic second hyperpolarizability of alkaline earth metal chains end capped with −NH2 and –CN. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2
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Mohan B, Choudhary M, Muhammad S, Das N, Singh K, Jana A, Bharti S, Algarni H, Al-Sehemi AG, Kumar S. Synthesis, characterizations, crystal structures, and theoretical studies of copper(II) and nickel(II) coordination complexes. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1761961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Bharti Mohan
- Department of Chemistry, National Institute of Technology, Patna, Bihar, India
| | - Mukesh Choudhary
- Department of Chemistry, National Institute of Technology, Patna, Bihar, India
| | - Shabbir Muhammad
- Department of Physics, College of Science, King Khalid University, Abha, Saudi Arabia
- Research Center for Advanced Materials Science, King Khalid University, Abha, Saudi Arabia
| | - Neeladri Das
- Department of Chemistry, Indian Institute of Technology, Patna, Bihar, India
| | - Khushwant Singh
- Department of Chemistry, Indian Institute of Technology, Patna, Bihar, India
| | - Achintya Jana
- Department of Chemistry, Indian Institute of Technology, Patna, Bihar, India
| | - Sulakshna Bharti
- Department of Chemistry, National Institute of Technology, Patna, Bihar, India
| | - H. Algarni
- Department of Physics, College of Science, King Khalid University, Abha, Saudi Arabia
| | - Abdullah G. Al-Sehemi
- Research Center for Advanced Materials Science, King Khalid University, Abha, Saudi Arabia
- Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia
| | - Santosh Kumar
- Division of Chemical Engineering, Konkuk University, Gwangjin-gu, Seoul, South Korea
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Talib SH, Hussain S, Muhammad S, Baskaran S, Iqbal J, Ayub K. Exploring the potential of novel transition metal complexes derived from ONO donor type ligand: a quantum chemical study. J Mol Model 2019; 25:284. [PMID: 31468196 DOI: 10.1007/s00894-019-4157-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 08/14/2019] [Indexed: 10/26/2022]
Abstract
In the present quantum chemical investigation, we predict several novel transition metal complexes which are designed using tridentate ONO donor type Schiff base ligand (2-((E)-((Z)-4-hydroxypent-3-en-2-ylidene) amino) phenol). The stable molecular geometries of newly designed metal complexes are obtained using density functional theory (DFT) methods. Several properties including geometrical parameters, energies of frontier molecular orbitals (FMOs), and interaction energies are calculated for optimized metal complexes. The more negative interaction energies illustrate more susceptibilities of the reaction of metal cations with ligand. The charge transfers from ligand to metals are observed in the d7 and d8 metal complexes while it is seen as backdonation of charge from metal to ligand in the d10 complexes. The quantum chemical characterizations are performed for calculating UV-visible spectra and IR frequencies for all the designed metal complexes. All designed metal complexes show multiple absorption peaks in UV region ranging from 184 to 376 nm, which are related to metal to ligand and ligand to metal charge transfer processes. The IR frequency analysis shows that the -C=N- stretching frequency of ligand in the region of 1650-1580 cm-1 is decreased by between 50 and 100 cm-1, which may assign the coordination of ligand with metal via nitrogen. Moreover, the investigations of nonlinear optical (NLO) polarizabilities among selected complexes show that these complexes may possess good potential for NLO applications. The most interesting results are found about the third-order NLO polarizabilities (γ||) where the γ|| amplitudes are found to be 60.01 × 10-36, 56.48 × 10-36, 90.04 × 10-36, and 64.57 × 10-36 esu for complexes 1, 2, 9, and 10, respectively. Thus, we believe that the present investigation may bring the newly designed metal complexes in the limelight of scientific interest for their practical realization in optical and nonlinear optical applications. Graphical abstract Several novel transition metal complexes are designed using tridentate ONO donor type Schiff base ligand as efficient NLO materials.
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Affiliation(s)
- Shamraiz Hussain Talib
- Theoretical and Computational Laboratory, Department of Chemistry, Tsinghua University, Beijing, 100084, People's Republic of China.,Department of Chemistry, Mohi-ud-Din Islamic University, Nerian Sharif, Azad Jammu & Kashmir, Pakistan
| | - Sajjad Hussain
- Department of Chemistry, Mohi-ud-Din Islamic University, Nerian Sharif, Azad Jammu & Kashmir, Pakistan.,Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Shabbir Muhammad
- Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia.
| | - Sambath Baskaran
- Theoretical and Computational Laboratory, Department of Chemistry, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Khurshid Ayub
- Department of Chemistry, COMSATS University, Abbottabad Campus, Abbottabad, KPK, 22060, Pakistan
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Muhammad S, Hussain S, Chen X, Al-Sehemi AG, Li ZJ, Lai CH, Iqbal J. A dual approach to study the synthesis, crystal structure and nonlinear optical properties of binuclear Pd(II) complex of 3-methyl-5-(trifluoromethyl) pyrazole and its potential quantum chemical analogues. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.05.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Second hyperpolarizability of diffuse-electron compounds M-NH3, M-NLi3 and M-NLi3-M of alkaline earth metals: Effect of lithiation. J Mol Graph Model 2019; 88:81-91. [DOI: 10.1016/j.jmgm.2019.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/09/2019] [Accepted: 01/09/2019] [Indexed: 11/19/2022]
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6
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Mondal A, Hatua K, Nandi PK. Why lithiation results large enhancement of second hyperpolarizability of delta shaped complexes M-C2H2 (M = Be, Mg and Ca)? Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.01.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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7
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Muhammad S, Kumar S, Koh J, Saravanabhavan M, Ayub K, Chaudhary M. Synthesis, characterisation, optical and nonlinear optical properties of thiazole and benzothiazole derivatives: a dual approach. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1475737] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Shabbir Muhammad
- Department of Physics, College of Science, King Khalid University , Abha, Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University , Abha, Saudi Arabia
| | - Santosh Kumar
- Department of Organic and Nano System Engineering, Konkuk University , Seoul, South Korea
| | - Joonseok Koh
- Department of Organic and Nano System Engineering, Konkuk University , Seoul, South Korea
| | | | - Khurshid Ayub
- Department of Chemistry, COMSATS Institute of Information Technology , Abbottabad, Pakistan
| | - Mukesh Chaudhary
- Department of Chemistry, National Institute of Technology Patna , Patna, India
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Mondal A, Hatua K, Roy RS, Nandi PK. Successive lithiation of acetylene, ethylene and benzene: a comprehensive computational study of large static second hyperpolarizability. Phys Chem Chem Phys 2018; 19:4768-4777. [PMID: 28133649 DOI: 10.1039/c6cp07845a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
This work is a revisit of the study of the electron correlation effect of lithium substitution on the second hyperpolarizability (106 a.u.) of acetylene, ethylene and benzene. The large quenching of mean second hyperpolarizability has been addressed by CCSD calculations. The inclusion of triple excitation in the MP4 method generally overestimates second hyperpolarizability in comparison to the MP4SDQ method. The present CCSD γav value of C6Li6: 405 × 104 a.u. obtained with a relatively larger basis set established the earlier prediction of Sadlej et al. [Phys. Chem. Phys. Chem., 2000, 2, 3393-3399] where degenerate non-dipolar transitions in low lying excited states play the crucial role. The successive lithiation results in gradual red shifting of transition energy leading to significant enhancement of second hyperpolarizability. Most of the chosen DFT functionals predict the correct qualitative trend of second hyperpolarizability. The quantitatively different results may be attributed to the case when the ground state wave function cannot be approximated by a single SD.
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Affiliation(s)
- Avijit Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India.
| | - Kaushik Hatua
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India.
| | - Ria Sinha Roy
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India.
| | - Prasanta K Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India.
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Diffuse electron of alkali metals (Li, Na, K) or diffuse electron pair of alkaline earth metals (Be, Mg, Ca) which predict larger second hyperpolarizability? A comprehensive study of M⋯NH3 model compounds. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Elhorri A, Zouaoui-Rabah M. NLO response of derivatives of benzene, stilbene and diphenylacetylene: MP2 and DFT calculations. Chin J Chem Eng 2017. [DOI: 10.1016/j.cjche.2016.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Muhammad S, Al-Sehemi AG, Su Z, Xu H, Irfan A, Chaudhry AR. First principles study for the key electronic, optical and nonlinear optical properties of novel donor-acceptor chalcones. J Mol Graph Model 2017; 72:58-69. [DOI: 10.1016/j.jmgm.2016.12.009] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/10/2016] [Accepted: 12/12/2016] [Indexed: 11/25/2022]
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Hatua K, Nandi PK. Effect of alkaline earth metal at the single wall CNT mouth on the electronic structure and second hyperpolarizability. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2016. [DOI: 10.1142/s0219633616500401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In the present work, electronic structure and second hyperpolarizability of a number of alkaline earth metals (M [Formula: see text] Be, Mg and Ca) complexes with carbon nanotube (CNT) has been studied by using different DFT functional. The complexes have sufficient thermal stability. Significant amount of charge transfer from metal to CNT results in stronger ground state polarization. The second hyperpolarizability obtained at different DFT functional (BHHLYP, CAM-B3LYP, B2PLYP, [Formula: see text]B97XD) showed a consistent trend. The magnitude of second hyperpolarizability of M@CNT[3,0] complexes enhances rather appreciably when a second metal atom is introduced into other mouth position. The longitudinal component of second hyperpolarizability of M@CNT[3,0]@M complexes increases with increasing size of metal atom. The magnitude of second hyperpolarizability of Ca@CNT[3,0]@Ca complex is comparable with Fe([Formula: see text]-C[Formula: see text]B[Formula: see text]. However, widening/lengthening of CNT markedly reduces the cubic responses. The two state model can qualitatively explain the variation of second hyperpolarizability.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Prasanta K. Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
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Banerjee P, Nandi PK. Electronic structures and second hyperpolarizabilities of alkaline earth metal complexes end-capped with NA2 (A = H, Li, Na). Phys Chem Chem Phys 2016; 18:12505-20. [DOI: 10.1039/c5cp07661g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The ground state structures and NLO properties of a number of alkaline earth metal complexes end-capped with NA2 groups (A = H, Li, Na) are calculated by employing the CAM-B3LYP, wB97XD and B2PLYP functionals along with MP2 and CCSD(T) for 6-311++G(d,p), 6-311++G(3df,3pd), aug-cc-pVTZ, aug-pc-2 and Hypol basis sets.
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Affiliation(s)
- Paramita Banerjee
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Prasanta K. Nandi
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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Hatua K, Nandi PK. Second hyperpolarizability of delta shaped disubstituted acetylene complexes of beryllium, magnesium, and calcium. J Mol Model 2015; 21:254. [PMID: 26361770 DOI: 10.1007/s00894-015-2804-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/26/2015] [Indexed: 10/23/2022]
Abstract
Present theoretical study involves the delta shape complexes of beryllium, magnesium, and calcium where the metal atom interacts perpendicularly with disubstituted acetylene. Most of the complexes are found to be fairly stable. The dependence of second-hyperpolarizability on the basis set with increasing polarization and diffuse functions has been examined which showed the importance of 'f-type' type polarization function for heavy metal (Mg, Ca) and 'd-type' polarization function for beryllium. Larger second hyperpolarizability has been predicted for complexes having significant ground state polarization and low lying excited states favoring strong electronic coupling. Transition energy plays the most significant role in modulating the second hyperpolarizability.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India
| | - Prasanta K Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India.
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15
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Electronic structure and second hyperpolarizability of M(NA2)2 (M = Be, Mg, Ca; A = H, Li, Na) complexes. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Sharapa D, Hirsch A, Meyer B, Clark T. Cubic C8 : An Observable Allotrope of Carbon? Chemphyschem 2015; 16:2165-71. [PMID: 26013967 DOI: 10.1002/cphc.201500230] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Indexed: 11/06/2022]
Abstract
Ab initio and DFT calculations are used to investigate the structure, electronic properties, spectra and reactivity of cubic C8 , which is predicted to be aromatic according to Hirsch's rule. Although highly strained and with a small amount of diradical character, the carbon cube represents a surprisingly deep minimum and should therefore be observable as an isolated molecule. It is, however, predicted to be very reactive, both with itself and triplet oxygen. Calculated IR, Raman, and UV/Vis spectra are provided to aid identification of cubic C8 should it be synthesized.
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Affiliation(s)
- Dmitry Sharapa
- Computer-Chemie-Centrum, Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052 Erlangen (Germany)
| | - Andreas Hirsch
- Lehrstuhl für Organische Chemie II, Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen (Germany)
| | - Bernd Meyer
- Computer-Chemie-Centrum, Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052 Erlangen (Germany).,Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052 Erlangen (Germany)
| | - Timothy Clark
- Computer-Chemie-Centrum, Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052 Erlangen (Germany). .,Centre for Molecular Design, University of Portsmouth, King Henry Building, Portsmouth PO1 2DY (UK).
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Hatua K, Nandi PK. Diradical character and second hyperpolarizability of multidecker inverse sandwich complexes of Mg and Ca. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.03.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hatua K, Nandi PK. Second hyperpolarizability of multimetallocenes [Cp–Mn–Cp] of Be, Mg and Ca. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s0219633615500029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Multimetallocene complexes ( Cp – M n– Cp ) of Be , Mg and Ca have been considered for the theoretical study of static second hyperpolarizability using a number of DFT functionals. Owing to the cooperative effect in bonding, beryllium forms multiberyllocene complexes ( Cp – Be n– Cp ) which have sufficient thermal stability with respect to dissociation into neutral fragments up to n = 10. On the other hand, multimetallocene complexes of Mg and Ca are found to be stable for n ≤ 5 which may be due to the weaker covalent bonding interaction between the larger metal atoms. The rather small variation of linear and cubic polarizabilities of Cp – Be n– Cp complexes beyond n = 5 arises from the rather weaker charge transfer transitions. The difference in NLO property among the investigated metal complexes arises from the extent of charge transfer from the terminal metal atoms and the distance between them. The charge transfer at longer distances in the ground state of Mg and Ca complexes leads to more intense electronic transition — the spectroscopic parameters of which strongly favors the enhancement of second hyperpolarizability.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Prasanta K. Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
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Double coned inverse sandwich complexes [M-(η4-C4H4)-M′] of Gr-IA and Gr-IIA Metals: theoretical study of electronic of structure and second hyperpolarizability. J Mol Model 2014; 20:2440. [DOI: 10.1007/s00894-014-2440-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 08/25/2014] [Indexed: 10/24/2022]
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Hatua K, Nandi PK. Static second hyperpolarizability of Λ shaped alkaline earth metal complexes. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633614500394] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A number of Λ shaped complexes of alkaline earth metals Be , Mg and Ca with varying terminal groups have been considered for the theoretical study of their second hyperpolarizability. The chosen complexes are found to be sufficiently stable and for a chosen ligand the stability decreases in the order: Be -complex > Ca -complex > Mg -complex. The calculated results of second hyperpolarizability obtained at different DFT functionals for the 6-311++G(d,p) basis set are found to be fairly consistent. The Λ shaped ligands upon complex formation with metals lead to strong enhancement of second hyperpolarizability. The highest magnitude of cubic polarizability has been predicted for the metal complex having > C ( C 2 H 5)2 group. For a chosen ligand, the magnitude of second hyperpolarizability increases in the order Be -complex < Mg -complex < Ca -complex which is the order of increasing size and electropositive character of the metal. The variation of second hyperpolarizability among the investigated metal complexes has been explained in terms of the transition energy and transition moment associated with the most intense electronic transition.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India
| | - Prasanta K. Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India
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Hatua K, Nandi PK. Third-order NLO property of beryllium-pyridyne complexes. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633613500752] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Six pyridyne isomers and their complexes with beryllium have been considered for the theoretical study of the third-order polarizability. The NLO properties are calculated by employing the DFT functionals BLYP, B3LYP, BHHLYP, B3PW91, BP86 and B2PLYP for the 6-311++G(d,p) basis set. The C - Be bond length in the complexes varies within 1.644 Å–1.771 Å indicating covalent interactions between the metal and pyridynes. The present investigation reveals that the magnitude of second-hyperpolarizability of pyridynes strongly enhances upon complex formation with beryllium. The maximum hyperpolarizability has been predicted for the 2,5-diberyllium pyridine complex. The lowest value of hyperpolarizability is obtained for the 2,3- and 3,4-diberyllium pyridine complexes. The chosen DFT methods predict almost identical pattern of variation of NLO property. The variation of second-hyperpolarizability has been satisfactorily explained by the excitation energy and transition dipole moment associated with the most dominant excited state.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India
| | - Prasanta K. Nandi
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India
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Hatua K, Nandi PK. Beryllium-cyclobutadiene multidecker inverse sandwiches: electronic structure and second-hyperpolarizability. J Phys Chem A 2013; 117:12581-9. [PMID: 24164393 DOI: 10.1021/jp407563f] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Beryllium forms stable sandwich and inverse sandwich complexes with the cyclobutadiene molecule. Two types of multidecker complexes are designed. Multidecker inverse sandwiches are found to be thermally more stable than the corresponding sandwich complexes. The average distance between two consecutive metals and the two consecutive cyclobutadiene rings increase gradually on increasing size of the chosen inverse sandwich complexes. The density functional theory functionals B3LYP, BHHLYP, BLYP, M06, CAM-B3LYP, and B2PLYP in conjunction with the 6-311++G (d, p) basis set have been employed for calculating the third-order electric response properties of the chosen beryllium-cyclobutadiene complexes and the results obtained for each functional are found to have a consistent trend. Compared to the normal sandwich compounds the second-hyperpolarizability of inverse sandwiches is predicated to be larger, which fairly correlates with the extent of ground-state polarization. The significant enhancement of cubic polarizability of higher-order multidecker inverse sandwiches arises from the strong coupling between the ground and the low lying charge transfer excited states. The rather strong enhancement of second-hyperpolarizability on increasing size of the beryllium-multidecker inverse sandwiches may provide a new route to design efficient nonlinear optical materials.
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Affiliation(s)
- Kaushik Hatua
- Department of Chemistry, Bengal Engineering and Science University , Shibpur, Howrah 711 103, India
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HATUA KAUSHIK, NANDI PRASANTAK. INTERACTION OF BERYLLIUM WITH ACCEPTOR HYDROCARBONS: ELECTRONIC STRUCTURE AND SECOND HYPERPOLARIZABILITY. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500466] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Some selected acceptor-Be hydrocarbon complexes have been considered for evaluation of second hyperpolarizability at different DFT functional. All the complexes have been found thermally stable and there is a significant increase of second hyperpolarizability compared to the ligands. Second hyperpolarizability has been explained in terms of charge transfer interaction. Co-operative interaction is required for maximization of second hyperpolarizability. Localized charge transfer in the vicinity of metal alone cannot increase second hyperpolarizability while charge delocalization over entire molecule is mandatory. Substitution by more electropositive metals e.g. Mg , Ca have greater enhancement in longitudinal component of γ. Basis set 6-311++G** is reasonable with respect to computational cost at aug-cc-pVnZ's (n = D, T, Q) for evaluation of second hyperpolarizability for the present complexes.
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Affiliation(s)
- KAUSHIK HATUA
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India
| | - PRASANTA K. NANDI
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India
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