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Cuc NTT, An NT, Ngan VT, Chandra AK, Trung NT. Importance of water and intramolecular interaction governs substantial blue shift of Csp2–H stretching frequency in complexes between chalcogenoaldehydes and water. RSC Adv 2022; 12:1998-2008. [PMID: 35425273 PMCID: PMC8979115 DOI: 10.1039/d1ra07444j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 01/04/2022] [Indexed: 11/25/2022] Open
Abstract
Geometrical structure, stability and cooperativity, and contribution of hydrogen bonds to the stability of complexes between chalcogenoaldehydes and water were thoroughly investigated using quantum chemical methods. The stability of the complexes increases significantly when one or more H2O molecules are added to the binary system, whereas it decreases sharply going from O to S, Se, or Te substitution. The O–H⋯O H-bond is twice as stable as Csp2–H⋯O and O–H⋯S/Se/Te H-bonds. It is found that a considerable blue-shift of Csp2–H stretching frequency in the Csp2–H⋯O H-bond is mainly determined by an addition of water into the complexes along with the low polarity of the Csp2–H covalent bond in formaldehyde and acetaldehyde. The Csp2–H stretching frequency shift as a function of net second hyperconjugative energy for the σ*(Csp2–H) antibonding orbital is observed. Remarkably, a considerable Csp2–H blue shift of 109 cm−1 has been reported for the first time. Upon the addition of H2O into the binary systems, halogenated complexes witness a decreasing magnitude of the Csp2–H stretching frequency blue-shift in the Csp2–H⋯O H-bond, whereas CH3-substituted complexes experience the opposite trend. The considerable blue shift of Csp2–H stretching frequency.![]()
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Affiliation(s)
- Nguyen Thi Thanh Cuc
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Nguyen Truong An
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Vu Thi Ngan
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Asit. K. Chandra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
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Cuc NTT, Phan CTD, Nhung NTA, Nguyen MT, Trung NT, Ngan VT. Theoretical Aspects of Nonconventional Hydrogen Bonds in the Complexes of Aldehydes and Hydrogen Chalcogenides. J Phys Chem A 2021; 125:10291-10302. [PMID: 34818019 DOI: 10.1021/acs.jpca.1c06708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrogen bonds (H-bonds) in the complexes between aldehydes and hydrogen chalcogenides, XCHO...nH2Z with X = H, F, Cl, Br, and CH3, Z = O, S, Se, and Te, and n = 1,2, were investigated using high-level ab initio calculations. The Csp2-H...O H-bonds are found to be about twice as strong as the Csp2-H...S/Se/Te counterparts. Remarkably, the S/Se/Te-H...S/Se/Te H-bonds are 4.5 times as weak as the O-H...O ones. The addition of the second H2Z molecule into binary systems induces stronger complexes and causes a positive cooperative effect in ternary complexes. The blue shift of Csp2-H stretching frequency involving the Csp2-H...Z H-bond sharply increases when replacing one H atom in HCHO by a CH3 group. In contrast, when one H atom in HCHO is substituted with a halogen, the magnitude of blue-shifting of the Csp2-H...Z H-bond becomes smaller. The largest blue shift up to 92 cm-1 of Csp2-H stretching frequency in Csp2-H...O H-bond in CH3CHO...2H2O has rarely been observed and is much greater than that in the cases of the Csp2-H...S/Se/Te ones. The Csp2-H blue shift of Csp2-H...Z bonds in the halogenated aldehydes is converted into a red shift when H2O is replaced by a heavier analogue, such as H2S, H2Se, or H2Te. The stability and classification of nonconventional H-bonds including Csp2-H...Se/Te, Te-H...Te, and Se/Te-H...O have been established for the first time.
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Affiliation(s)
- Nguyen Thi Thanh Cuc
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Cam-Tu Dang Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University, Hue 49000, Vietnam
| | | | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Vu Thi Ngan
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
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Ma P, Fang Y, Li A, Wen B, Cheng H, Zhou X, Shi Y, Yang HY, Lin Y. Highly efficient and stable ionic liquid-based gel electrolytes. NANOSCALE 2021; 13:7140-7151. [PMID: 33889871 DOI: 10.1039/d0nr08765c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Gel electrolytes are promising candidates for dye-sensitized solar cells (DSSCs) and other devices, but the ways to obtain stable gels always result in sacrifice of their ionic conductivity. This contradiction seriously limits the practical application of gel electrolytes. Herein, a new design strategy using rich carboxylic group-modified silica nanoparticles (COOH-SiO2) with a branched, well-organized framework to develop ionic liquid-based gel electrolytes possessing high conductivity is demonstrated. The branched network of COOH-SiO2 and the strong interaction in electrolytes result in the effective solidification of ionic liquids. Moreover, adding COOH-SiO2 to ionic liquid electrolytes contributes to salt dissociation, decreases the activation energy, and improves the charge transport and recombination characteristics at the electrolyte/electrode interface. DSSCs fabricated with COOH-SiO2 nanoparticles deliver a higher short-circuit photocurrent density (Jsc) than the reference cell. A maximum efficiency of 8.02% with the highest Jsc value of 16.60 mA cm-2 is obtained for solar cells containing 6 wt% COOH-SiO2.
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Affiliation(s)
- Pin Ma
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China.
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Bhattacharyya S, Ghosh S, Wategaonkar S. O-H stretching frequency red shifts do not correlate with the dissociation energies in the dimethylether and dimethylsulfide complexes of phenol derivatives. Phys Chem Chem Phys 2021; 23:5718-5739. [PMID: 33662068 DOI: 10.1039/d0cp01589j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this perspective, we present a comprehensive report on the spectroscopic and computational investigations of the hydrogen bonded (H-bonded) complexes of Me2O and Me2S with seven para-substituted H-bond donor phenols. The salient finding was that although the dissociation energies, D0, of the Me2O complexes were consistently higher than those of the analogous Me2S complexes, the red-shifts in phenolic O-H frequencies, Δν(O-H), showed the exactly opposite trend. This is in contravention of the general perception that the red shift in the X-H stretching frequency in the X-HY hydrogen bonded complexes is a reliable indicator of H-bond strength (D0), a concept popularly known as the Badger-Bauer rule. This is also in contrast to the trend reported for the H-bonded complexes of H2S/H2O with several para substituted phenols of different pKa values wherein the oxygen centered hydrogen bonded (OCHB) complexes consistently showed higher Δν(O-H) and D0 compared to those of the analogous sulfur centered hydrogen bonded (SCHB) complexes. Our effort was to understand these intriguing observations based on the spectroscopic investigations of 1 : 1 complexes in combination with a variety of high level quantum chemical calculations. Ab initio calculations at the MP2 level and the DFT calculations using various dispersion corrected density functionals (including DFT-D3) were performed on counterpoise corrected surfaces to compute the dissociation energy, D0, of the H-bonded complexes. The importance of anharmonic frequency computations is underscored as they were able to correctly reproduce the observed trend in the relative OH frequency shifts unlike the harmonic frequency computations. We have attempted to find a unified correlation that would globally fit the observed red shifts in the O-H frequency with the H-bonding strength for the four bases, namely, H2S, H2O, Me2O, and Me2S, in this set of H-bond donors. It was found that the proton affinity normalized Δν(O-H) values scale very well with the H-bond strength.
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Affiliation(s)
- Surjendu Bhattacharyya
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India.
| | - Sanat Ghosh
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India.
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India.
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Sruthi PK, Chandra S, Ramanathan N, Sundararajan K. Unusual blue to red shifting of C-H stretching frequency of CHCl 3 in co-operatively P⋯Cl phosphorus bonded POCl 3-CHCl 3 heterodimers at low temperature inert matrixes. J Chem Phys 2020; 153:174305. [PMID: 33167652 DOI: 10.1063/5.0031162] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Heterodimers of POCl3-CHCl3 were generated in Ne, Ar, and Kr matrixes at low temperatures and were studied using infrared spectroscopy. The remarkable role of co-operative pentavalent phosphorus bonding in the stabilization of the structure dictated by hydrogen bonding is deciphered. The complete potential energy surface of the heterodimer was scanned by ab initio and density functional theory computational methodologies. The hydrogen bond between the phosphoryl oxygen of POCl3 and C-H group of CHCl3 in heterodimers induces a blue-shift in the C-H stretching frequency within the Ne matrix. However, in Ar and Kr matrixes, the C-H stretching frequency is exceptionally red-shifted in stark contrast with Ne. The plausibility of the Fermi resonance by the C-H stretching vibrational mode with higher order modes in the heterodimers has been eliminated as a possible cause within Ar and Kr matrixes by isotopic substitution (CDCl3) experiments. To evaluate the influence of matrixes as a possible cause of red-shift, self-consistent Iso-density polarized continuum reaction field model was applied. This conveyed the important role of the dielectric matrixes in inducing the fascinating vibrational shift from blue (Ne) to red (Ar and Kr) due to the matrix specific transmutation of the POCl3-CHCl3 structure. The heterodimer produced in the Ne matrix possesses a cyclic structure stabilized by hydrogen bonding with co-operative phosphorus bonding, while in Ar and Kr the generation of an acyclic open structure stabilized solely by hydrogen bonding is promoted. Compelling justification regarding the dispersion force based influence of matrix environments in addition to the well-known dielectric influence is presented.
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Affiliation(s)
- P K Sruthi
- Homi Bhabha National Institute, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
| | - Swaroop Chandra
- Homi Bhabha National Institute, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
| | - N Ramanathan
- Homi Bhabha National Institute, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
| | - K Sundararajan
- Homi Bhabha National Institute, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
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Abstract
The fundamental underpinnings of noncovalent bonds are presented, focusing on the σ-hole interactions that are closely related to the H-bond. Different means of assessing their strength and the factors that control it are discussed. The establishment of a noncovalent bond is monitored as the two subunits are brought together, allowing the electrostatic, charge redistribution, and other effects to slowly take hold. Methods are discussed that permit prediction as to which site an approaching nucleophile will be drawn, and the maximum number of bonds around a central atom in its normal or hypervalent states is assessed. The manner in which a pair of anions can be held together despite an overall Coulombic repulsion is explained. The possibility that first-row atoms can participate in such bonds is discussed, along with the introduction of a tetrel analog of the dihydrogen bond.
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Affiliation(s)
- Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
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Lu J, Scheiner S. Relationships between Bond Strength and Spectroscopic Quantities in H-Bonds and Related Halogen, Chalcogen, and Pnicogen Bonds. J Phys Chem A 2020; 124:7716-7725. [DOI: 10.1021/acs.jpca.0c05936] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jia Lu
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
| | - Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
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The interplay and the formation of σ-hole in the π···LiX and pseudo-π···LiX (X = F, Cl and CN) lithium bonds involving unsaturated and homocyclic hydrocarbons. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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10
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Kannan P, Karthick N, Mahendraprabu A, Kumbharkhane A, Joshi Y, Arivazhagan G. FTIR spectroscopy, quantum chemical calculations and time domain reflectometry studies on the behavior of methanol molecules in the environment of dibutyl ether. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.01.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Ghosh S, Wategaonkar S. C–H···O Hydrogen Bond Anchored Water Bridge in 1,2,4,5-Tetracyanobenzene-Water Clusters. J Phys Chem A 2019; 123:3851-3862. [DOI: 10.1021/acs.jpca.9b02238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sanat Ghosh
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
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12
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Panda S, Kundu K, Kiefer J, Umapathy S, Gardas RL. Molecular-Level Insights into the Microstructure of a Hydrated and Nanoconfined Deep Eutectic Solvent. J Phys Chem B 2019; 123:3359-3371. [PMID: 30924657 DOI: 10.1021/acs.jpcb.9b01603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Despite the recent advancements in the field of deep eutectic solvents (DESs), their high viscosity often prevents practical applications. A versatile strategy to overcome this problem is either to add a co-solvent or to confine the DES inside a nanoscaled self-organized system. This work assesses the microstructures of a hydrated and nanoconfined DES comprising benzyltripropylammonium chloride [BTPA]Cl and ethylene glycol (EG). They act as a hydrogen-bond acceptor and a donor, respectively. The hydrogen bonding between [BTPA]Cl and EG in the DES (i.e., BTEG) and the molecular states of water in the hydrated BTEG were studied by Raman spectroscopy. The results show different hydrogen-bonding associations between water-water and water-BTEG or EG molecules. In addition, we investigated the confinement effects of BTEG in a Polysorbate 80 (Tween-80)/cyclohexane reverse micellar (RM) system. The results are compared with those of an ionic liquid-encapsulated RM system. The formation, bonding characteristics, and thermal stability of the RM droplets were studied by solubilization, dynamic light scattering, rheology, and Raman spectroscopy experiments. Furthermore, it is shown that hydrogen bonding between the DES and the surfactant leads to a stable RM system. Interestingly, the viscosity of the RM system is significantly lower than that of the neat DES suggesting that DESs have a much wider practical applicability in the form of RMs.
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Affiliation(s)
- Somenath Panda
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Kaushik Kundu
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Johannes Kiefer
- Technische Thermodynamik , University of Bremen , Bremen 28359 , Germany
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Ramesh L Gardas
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
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13
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Afonin AV, Pavlov DV, Vashchenko AV. Case study of 2-vinyloxypyridine: Quantitative assessment of the intramolecular C H⋯N hydrogen bond energy and its contribution to the one-bond 13C1H coupling constant. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.08.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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14
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Sen S, Patwari GN. Electrostatics and Dispersion in X-H···Y (X = C, N, O; Y = N, O) Hydrogen Bonds and Their Role in X-H Vibrational Frequency Shifts. ACS OMEGA 2018; 3:18518-18527. [PMID: 31458423 PMCID: PMC6644087 DOI: 10.1021/acsomega.8b01802] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 11/19/2018] [Indexed: 06/10/2023]
Abstract
The frequency shifts of donor stretching vibration in X-H···Y (X = C, N, O; Y = N, O) hydrogen-bonded complexes of phenylacetylene, indole, and phenol are linearly correlated with the electrostatic component of the interaction energy. This linear correlation suggests that the electrostatic component, which is the first-order perturbative correction to the stabilization energy, is essentially localized on the X-H group. The linear correlation suggests that the electrostatic tuning rate, which is a measure of the X-H oscillator to undergo shifts upon hydrogen bonding per unit increase in the electrostatic component of the stabilization energy, was found to be in the order of O-H > N-H > C-H. Interestingly, for each of the donor groups, viz., C-H, N-H, and O-H, the vibrational frequency shifts were inversely correlated to the dipole moment of the acceptor separately, which is counterintuitive vis-à-vis the electrostatic component. This implies that extrapolation to zero dipole moment of the acceptor will yield very large shifts in the hydrogen-bonded X-H stretching frequencies. The trends in the variation of the dispersion and exchange-repulsion components and the total interaction energy vis-à-vis frequency shifts of donor stretching vibration are similar for hydrogen-bonded complexes of phenylacetylene, indole, and phenol. Furthermore, it was observed that the vibrational frequency shifts of all of the complexes are linearly correlated with the charge transfer from the filled orbital of the hydrogen acceptor to the vacant antibonding (σ*) orbital of the X-H donor group on the basis of natural bonding orbital calculations.
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Affiliation(s)
| | - G. Naresh Patwari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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15
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Behera B, Das PK. Blue- and Red-Shifting Hydrogen Bonding: A Gas Phase FTIR and Ab Initio Study of RR'CO···DCCl 3 and RR'S···DCCl 3 Complexes. J Phys Chem A 2018; 122:4481-4489. [PMID: 29683668 DOI: 10.1021/acs.jpca.7b11962] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Blue-shifting H-bonded (C-D···O) complexes between CDCl3 and CH3HCO, (CH3)2CO, and C2H5(CH3)CO, and red-shifting H-bonded (C-D···S) complexes between CDCl3 with (CH3)2S and (C2H5)2S have been identified by Fourier transform infrared spectroscopy in the gas phase at room temperature. With increasing partial pressure of the components, a new band appears in the C-D stretching region of the vibrational spectra. The intensity of this band decreases with an increase in temperature at constant pressure, which provides the basis for identification of the H-bonded bands in the spectrum. The C-D stretching frequency of CDCl3 is blue-shifted by +7.1, +4, and +3.2 cm-1 upon complexation with CH3HCO, (CH3)2CO, and C2H5(CH3)CO, respectively, and red-shifted by -14 and -19.2 cm-1 upon complexation with (CH3)2S and (C2H5)2S, respectively. By using quantum chemical calculations at the MP2/6-311++G** level, we predict the geometry, electronic structural parameters, binding energy, and spectral shift of H-bonded complexes between CDCl3 and two series of compounds named RCOR' (H2CO, CH3HCO, (CH3)2CO, and C2H5(CH3)CO) and RSR' (H2S, CH3HS, (CH3)2S, and (C2H5)2S) series. The calculated and observed spectral shifts follow the same trends. With an increase in basicity of the H-bond acceptor, the C-D bond length increases, force constant decreases, and the frequency shifts to the red from the blue. The potential energy scans of the above complexes are done, which show that electrostatic attraction between electropositive D and electron-rich O/S causes bond elongation and red shift, and the electronic and nuclear repulsions lead to bond contraction and blue shifts. The dominance of the two opposing forces at the equilibrium geometry of the complex determines the nature of the shift, which changes both in magnitude and in direction with the basicity of the hydrogen-bond acceptor.
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Affiliation(s)
- B Behera
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Puspendu K Das
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
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16
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Banerjee P, Chakraborty T. Weak hydrogen bonds: insights from vibrational spectroscopic studies. INT REV PHYS CHEM 2018. [DOI: 10.1080/0144235x.2018.1419731] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Pujarini Banerjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
| | - Tapas Chakraborty
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
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17
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Jin S, Hu Y, Wang P, Zhan H, Lu Q, Liu F, Sheng L. Hydrogen bonding and dominant conformations of hydrated sugar analogue complexes using tetrahydrofurfuryl alcohol as the model sugar molecule. Phys Chem Chem Phys 2018; 20:7351-7360. [DOI: 10.1039/c7cp07935d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water molecules, which serve as both hydrogen bond donors and acceptors, have been found to influence the conformational landscape of gas-phase phenyl-β-d-glucopyranoside.
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Affiliation(s)
- Shan Jin
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Pengchao Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Huaqi Zhan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Qiao Lu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Fuyi Liu
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Liusi Sheng
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
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18
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Wang P, Hu Y, Zhan H, Chen J, Jin S, Song W, Li Y. Vibrational spectroscopy of the mass-selected tetrahydrofurfuryl alcohol monomers and its dimers in gas phase using IR depletion and VUV single photon ionization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 185:63-68. [PMID: 28544895 DOI: 10.1016/j.saa.2017.04.089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/22/2017] [Accepted: 04/30/2017] [Indexed: 06/07/2023]
Abstract
Tetrahydrofurfuryl alcohol (THFA, C5H10O2) is a close chemical analog of the sugar rings present in the phosphate-deoxyribose backbone structure of the nucleic acids. In present report, the infrared (IR) spectra of the size-selected THFA monomer and its dimer have been investigated in a pulsed supersonic jet using infrared-vacuum ultraviolet (VUV) ionization. Herein, the laser light at 118nm wavelength served as the source of "soft" ionization in a time-of-flight mass spectrometer. The IR features for the monomers located at 3622cm-1 can be assigned to the intramolecular hydrogen bonding stretch vibrations mainly referring to A and C conformers. Compared with the monomer, however, characteristic peaks for the dimer centered at 3415 and 3453cm-1, red shifted 207 and 169cm-1, respectively, were associated with the intermolecular hydrogen bonding stretch vibrations. Combined with the quantum-chemical calculations, the dimer in the gas phase preferred cyclic AC conformer stabled by forming two strong intermolecular hydrogen bonds, which shown the high hydrogen bond selectivity in the cluster. The conclusions drawn from the role played in the conformational flexibility by the hydroxyl and ether groups may be extended to other biomolecules.
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Affiliation(s)
- Pengchao Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China.
| | - Huaqi Zhan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
| | - Jiaxin Chen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
| | - Shan Jin
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
| | - Wentao Song
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
| | - Yujian Li
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
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Bhattacherjee A, Wategaonkar S. Conformational Heterogeneity and the Role of the C(2)-H Donor in Mono- and Dihydrated Clusters of Benzoxazole. J Phys Chem A 2017; 121:5420-5427. [PMID: 28665613 DOI: 10.1021/acs.jpca.7b04058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The significance of the heteroatom in influencing the acidity and binding affinity of the C(2)-H donor in five-membered heterocyclic rings is explored. The water clusters of benzoxazole (BOX) are studied in a supersonic jet by IR-UV double resonance spectroscopy and compared with those of benzimidazole (BIM) and its N-methyl derivative (MBIM). Two conformers are identified for the monohydrated cluster, both of which are O-H···N bound and differ in their orientation with respect to the intermolecular hydrogen bond. IR spectroscopy of the doubly hydrated cluster shows the presence of an intensity enhanced C(2)-H (carbon atom between the heteroatoms in the five-membered ring) stretching mode in addition to two red-shifted bound OH stretches, indicating that the water molecules form a hydrogen-bonded bridge encompassing the N acceptor and the weakly activated C(2)-H bond in oxazole. Comparison of the topological parameters of electron density, natural bond orbital analyses, and computed binding energies of the analogous hydrated structures of BOX, BIM, and MBIM indicates that the C(2)-H bond in the former is a more potent H-bond donor.
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Affiliation(s)
- Aditi Bhattacherjee
- Department of Chemical Sciences, Tata Institute of Fundamental Research , Homi Bhabha Road, Mumbai 400 005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research , Homi Bhabha Road, Mumbai 400 005, India
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20
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Kannan P, Karthick N, Mahendraprabu A, Shanmugam R, Elangovan A, Arivazhagan G. Red/blue shifting hydrogen bonds in acetonitrile-dimethyl sulphoxide solutions: FTIR and theoretical studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.03.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Gopi R, Ramanathan N, Sundararajan K. Experimental evidence for the blue-shifted hydrogen-bonded complexes of CHF 3 with π-electron donors. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 181:137-147. [PMID: 28351820 DOI: 10.1016/j.saa.2017.03.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 03/10/2017] [Accepted: 03/20/2017] [Indexed: 06/06/2023]
Abstract
Blue-shifted hydrogen-bonded complexes of fluoroform (CHF3) with benzene (C6H6) and acetylene (C2H2) have been investigated using matrix isolation infrared spectroscopy and ab initio computations. For CHF3-C6H6 complex, calculations performed at the B3LYP and MP2 levels of theory using 6-311++G (d,p) and aug-cc-pVDZ basis sets discerned two minima corresponding to a 1:1 hydrogen-bonded complex. The global minimum correlated to a structure, where the interaction is between the hydrogen of CHF3 and the π-electrons of C6H6 and a weak local minimum was stabilized through H…F interaction. For the CHF3-C2H2 complex, computation performed at MP2/aug-cc-pVDZ level of theory yielded two minima, corresponding to the cyclic C-H…π complex A (global) and a linear C-H…F (n-σ) complex B (local). Experimentally a blue-shift of 32.3cm-1 and 7.7cm-1 was observed in the ν1 C-H stretching mode of CHF3 sub-molecule in Ar matrix for the 1:1 C-H…π complexes of CHF3 with C6H6 and C2H2 respectively. Natural bond orbital (NBO), Atoms-in-molecule (AIM) and energy decomposition (EDA) analyses were carried out to explain the blue-shifting and the nature of the interaction in these complexes.
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Affiliation(s)
- R Gopi
- Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India; Homi Bhabha National Institute, Kalpakkam 603102, India
| | - N Ramanathan
- Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
| | - K Sundararajan
- Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India; Homi Bhabha National Institute, Kalpakkam 603102, India.
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22
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Bhattacherjee A, Wategaonkar S. Role of the C(2)–H Hydrogen Bond Donor in Gas-Phase Microsolvation of Imidazole Derivatives with ROH (R = CH3, C2H5). J Phys Chem A 2017; 121:4283-4295. [DOI: 10.1021/acs.jpca.7b03329] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aditi Bhattacherjee
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
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23
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Zhan H, Hu Y, Wang P, Chen J. Molecular structures of gas-phase neutral morpholine and its monohydrated complexes: experimental and theoretical approaches. RSC Adv 2017. [DOI: 10.1039/c6ra26582k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Morpholine (NH(CH2CH2)2O) is a typical six-membered aliphatic heterocyclic compound.
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Affiliation(s)
- Huaqi Zhan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Pengchao Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Jiaxin Chen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
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24
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Sutradhar D, Zeegers-Huyskens T, Chandra AK. Theoretical study of the interaction between pyridine derivatives and atomic chlorine. Substituent effect and nature of the bonding. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1014440] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Lee SY, Kang H. Quantum Mechanical Study on the Blue-Shifting Hydrogen-Bond between 3-Aminophenol and CHX3(X ═ F, Cl). B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- So Young Lee
- Department of Chemistry; Ajou University; Suwon 443-749 Korea
| | - Hyuk Kang
- Department of Chemistry; Ajou University; Suwon 443-749 Korea
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26
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Banerjee P, Chakraborty T. Correlation of νOH Spectral Shifts of Phenol–Benzene O–H···π Hydrogen-Bonded Complexes with Donor’s Acidity: A Combined Matrix Isolation, Infrared Spectroscopy, and Quantum Chemistry Study. J Phys Chem A 2014; 118:7074-84. [DOI: 10.1021/jp5033993] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pujarini Banerjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India
| | - Tapas Chakraborty
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India
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27
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Gopi R, Ramanathan N, Sundararajan K. Experimental evidence for blue-shifted hydrogen bonding in the fluoroform-hydrogen chloride complex: a matrix-isolation infrared and ab initio study. J Phys Chem A 2014; 118:5529-39. [PMID: 24979667 DOI: 10.1021/jp503718v] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The 1:1 hydrogen-bonded complex of fluoroform and hydrogen chloride was studied using matrix-isolation infrared spectroscopy and ab initio computations. Using B3LYP and MP2 levels of theory with 6-311++G(d,p) and aug-cc-pVDZ basis sets, the structures of the complexes and their energies were computed. For the 1:1 CHF3-HCl complexes, ab initio computations showed two minima, one cyclic and the other acyclic. The cyclic complex was found to have C-H · · · Cl and C-F · · · H interactions, where CHF3 and HCl sub-molecules act as proton donor and proton acceptor, respectively. The second minimum corresponded to an acyclic complex stabilized only by the C-F · · · H interaction, in which CHF3 is the proton acceptor. Experimentally, we could trap the 1:1 CHF3-HCl cyclic complex in an argon matrix, where a blue-shift in the C-H stretching mode of the CHF3 sub-molecule was observed. To understand the nature of the interactions, Atoms in Molecules and Natural Bond Orbital analyses were carried out to unravel the reasons for blue-shifting of the C-H stretching frequency in these complexes.
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Affiliation(s)
- R Gopi
- Chemistry Group, Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102, Tamil Nadu, India
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28
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Shirhatti PR, Maity DK, Bhattacharyya S, Wategaonkar S. CH⋅⋅⋅N Hydrogen-Bonding Interaction in 7-Azaindole:CHX3(X=F, Cl) Complexes. Chemphyschem 2013; 15:109-17. [DOI: 10.1002/cphc.201300731] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 10/15/2013] [Indexed: 11/12/2022]
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29
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Yang W, Hu Y, Xie M. Adsorption behavior of 6-Mercaptonicotinic acid on self-assembled gold nano-substrates explored by SERS combined with theoretical calculations. J Colloid Interface Sci 2013; 408:151-6. [PMID: 23948461 DOI: 10.1016/j.jcis.2013.07.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/04/2013] [Accepted: 07/08/2013] [Indexed: 11/25/2022]
Abstract
As a typical Raman reporter molecule, 6-Mercaptonicotinic acid (C6H5NO2S, MNA) has three atoms (i.e., N, O, and S), which could be potential to chemically interact with gold nano-surface. In the present report, the adsorption behavior of MNA on self-assembled gold nano-substrates is explored by means of surface-enhanced Raman scattering and theoretical calculations. The results reveal that all the enhanced bands are assigned to in-plane vibrations. The ring triangle breathing coupling with CS stretching band at 1108cm(-)(1) is enhanced a lot and redshifts to 1088cm(-)(1) in the SERS spectra. Furthermore, most of the bands related to N atom are apparently enhanced and shift in the SERS spectra. Based on the surface selection rule, it infers that MNA is vertically chemisorbed on self-assembled gold substrates through the S and the N atoms. The spectroscopic results are further interpreted by the density functional theory (DFT) calculations.
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Affiliation(s)
- Wenpeng Yang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
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30
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Sundararajan K, Ramanathan N, Viswanathan K, Vidya K, Jemmis ED. Complexes of acetylene–fluoroform: A matrix isolation and computational study. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.05.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Bhattacharyya S, Bhattacherjee A, Shirhatti PR, Wategaonkar S. O-H···S hydrogen bonds conform to the acid-base formalism. J Phys Chem A 2013; 117:8238-50. [PMID: 23947570 DOI: 10.1021/jp405414h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogen bonding interaction between the ROH hydrogen bond donor and sulfur atom as an acceptor has not been as well characterized as the O-H···O interaction. The strength of O-H···O interactions for a given donor has been well documented to scale linearly with the proton affinity (PA) of the H-bond acceptor. In this regard, O-H···O interactions conform to the acid-base formalism. The importance of such correlation is to be able to estimate molecular property of the complex from the known thermodynamic data of its constituents. In this work, we investigate the properties of O-H···S interaction in the complexes of the H-bond donor and sulfur containing acceptors of varying proton affinity. The hydrogen bonded complexes of p-Fluorophenol (FP) with four different sulfur containing acceptors and their oxygen analogues, namely H2O/H2S, MeOH/MeSH, Me2O/Me2S and tetrahydrofuran (THF)/tetrahydrothiophene (THT) were characterized in regard to its S1-S0 excitation spectra and the IR spectra. Two-color resonantly enhanced multiphoton ionization (2c-R2PI), resonant ion-dip infrared (RIDIR) spectroscopy, and IR-UV hole burning spectroscopic techniques were used to probe the hydrogen bonds in the aforementioned complexes. The spectroscopic data along with the ab initio calculations were used to deduce the strength of the O-H···S hydrogen bonding interactions in these system relative to that in the O-H···O interactions. It was found that, despite being dominated by the dispersion interaction, the O-H···S interactions conform to the acid-base formalism as in the case of more conventional O-H···O interactions. The dissociation energies and the red shifts in the O-H stretching frequencies correlated very well with the proton affinity of the acceptors. However, the O-H···S interaction did not follow the same correlation as that in the O-H···O H-bond. The energy decomposition analysis showed that the dissociation energies and the red shifts in the O-H stretching frequencies follow a unified correlation if these two parameters were correlated with the sum of the charge transfer and the exchange component of the total binding energy.
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Affiliation(s)
- Surjendu Bhattacharyya
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Colaba, Mumbai, India
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32
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Brovarets’ OO, Yurenko YP, Hovorun DM. Intermolecular CH···O/N H-bonds in the biologically important pairs of natural nucleobases: a thorough quantum-chemical study. J Biomol Struct Dyn 2013; 32:993-1022. [PMID: 23730732 DOI: 10.1080/07391102.2013.799439] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Shirhatti PR, Maity DK, Wategaonkar S. C–H···Y Hydrogen Bonds in the Complexes of p-Cresol and p-Cyanophenol with Fluoroform and Chloroform. J Phys Chem A 2013; 117:2307-16. [DOI: 10.1021/jp311596x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pranav R. Shirhatti
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai 400005,
India
| | - Dilip K. Maity
- Theoretical Chemistry
Section,
Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai 400005,
India
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34
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Functionalized carbon nanotube-induced viscosity reduction of an ionic liquid and performance improvement of dye-sensitized solar cells. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Xie M, Qi Y, Hu Y. Conformational Equilibrium and Hydrogen Bonding in Liquid 2-Phenylethylamine Explored by Raman Spectroscopy and Theoretical Calculations. J Phys Chem A 2011; 115:3060-7. [DOI: 10.1021/jp109194v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Min Xie
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yajing Qi
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
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36
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Rutkowski KS, Melikova SM, Rospenk M, Koll A. Strong and weak effects caused by non covalent interactions between chloroform and selected electron donor molecules. Phys Chem Chem Phys 2011; 13:14223-34. [DOI: 10.1039/c1cp20727j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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