Journal of Physical Organic Chemistry最新文献

筛选
英文 中文
In silico end-capped engineering of 4,4′-dimethyl-[2, 2′-bithiazole] core-based acceptor materials for high-performance organic solar cells 高性能有机太阳能电池用4,4′-二甲基-[2,2′-双噻唑]核基受体材料的硅端封工程
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-07-05 DOI: 10.1002/poc.4557
Samreen Kousar, Fatiqa Zafar, Asifa Rani, Riaz Hussain, Javed Iqbal, Muhammad Amin Abid, Waseeq-Ul-Islam Zafar, Muhammad Adnan, Mahrzadi Noreen Shahi
{"title":"In silico end-capped engineering of 4,4′-dimethyl-[2, 2′-bithiazole] core-based acceptor materials for high-performance organic solar cells","authors":"Samreen Kousar,&nbsp;Fatiqa Zafar,&nbsp;Asifa Rani,&nbsp;Riaz Hussain,&nbsp;Javed Iqbal,&nbsp;Muhammad Amin Abid,&nbsp;Waseeq-Ul-Islam Zafar,&nbsp;Muhammad Adnan,&nbsp;Mahrzadi Noreen Shahi","doi":"10.1002/poc.4557","DOIUrl":"10.1002/poc.4557","url":null,"abstract":"<p>Organic solar cells (OSCs) have grabbed the attention of researchers due to good power conversion efficiency, low cost, and ability to compensate for light deficit. The aim of the present research work is to increase the efficiency of previously synthesized reference (R) molecule 2,2′-((2Z,2′Z)-(((4,4′-dimethyl-[2,2′-bithiazole]-5,5′-diyl)bis(4-(2-butyloctyl)thiophene-5,2-diyl))bis (methaneylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1<i>H</i>-indene-2,1-diylidene))dimalononitrile by improving its photovoltaic properties via end cap engineering. Five new acceptors, namely, E1, E2, E3, E4, and E5, are used to substitute the end group of reference molecule. Several parameters have been analyzed using density functional theory including the absorption maxima, charge transfer analysis, frontier molecular orbital (FMO), open circuit voltage (<i>V</i><sub>oc</sub>), density of states (DOS), photochemical characteristics, transition density matrix (TDM), and the electron-hole reorganization energies to evaluate the efficiency of specially engineered molecules. All the engineered molecules (D1-D5) had smaller energy gap (4.50–4.71 eV) compared with reference (4.75 eV) and absorption maxima in the range of 443.37–482.67 nm in solvent phase due to end-cap acceptor modification. Fabricated molecules (D1-D5) showed smaller electron reorganizational energy values (0.18–0.27 eV) and <i>V</i><sub>oc</sub> ranging from 1.94 to 2.40 eV. Designed molecule D3 being an acceptor when blended with donor polymer (PTB7-Th) portrayed highest charge transfer capability owing to its smallest energy gap (4.50 eV) among all the engineered molecules. D5 molecule exhibits higher <i>V</i><sub>oc</sub> (2.40 eV), greater LHE (0.9988), and superior result of fill factor (94.15%) as compared with R, which leads to improve the efficiency of OSCs. Theoretical findings illustrated the superior behavior of all the designed molecules making them suitable aspirants to construct efficient OSC devices.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43714388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Solvent effects on the sodium borohydride reduction of 2-halocyclohexanones 硼氢化钠还原2-卤代环己酮的溶剂效应
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-23 DOI: 10.1002/poc.4556
Daniela Rodrigues Silva, Lucas A. Zeoly, Pascal Vermeeren, Rodrigo A. Cormanich, Trevor A. Hamlin, Célia Fonseca Guerra, Matheus P. Freitas
{"title":"Solvent effects on the sodium borohydride reduction of 2-halocyclohexanones","authors":"Daniela Rodrigues Silva,&nbsp;Lucas A. Zeoly,&nbsp;Pascal Vermeeren,&nbsp;Rodrigo A. Cormanich,&nbsp;Trevor A. Hamlin,&nbsp;Célia Fonseca Guerra,&nbsp;Matheus P. Freitas","doi":"10.1002/poc.4556","DOIUrl":"10.1002/poc.4556","url":null,"abstract":"<p>We have investigated the stereoselectivity and reactivity of the sodium borohydride reduction of 2-X-cyclohexanones (X=H, Cl, Br) using a combined approach of competitive experiments and density functional theory calculations. Our results show that the hydride addition proceeds via a late transition state in which the C–H bond is nearly formed, consistent with the mild reducing power of NaBH<sub>4</sub>. The reaction barrier decreases from the 2-halocyclohexanones to the unsubstituted cyclohexanone, in line with relative reactivities observed in the competitive experiments. Furthermore, we provide a protocol to solve the longstanding issue of properly modelling the axial–equatorial facial selectivity of hydride addition to the carbonyl group substituted with a vicinal polar group. The inclusion of implicit solvation in combination with an explicit solvent molecule is crucial to reproduce the stereoselective formation of the <i>cis</i> product observed experimentally.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45395148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical and experimental study of the OH radical with 3-bromopropene gas phase reaction rate coefficients temperature dependence OH自由基与3-溴丙烷气相反应速率系数温度相关性的理论和实验研究。
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-16 DOI: 10.1002/poc.4555
Mauro González Vera, Pablo Marcelo Cometto, Juan Manuel Casañas, Glauco F. Bauerfeldt, Abdelwahid Mellouki
{"title":"Theoretical and experimental study of the OH radical with 3-bromopropene gas phase reaction rate coefficients temperature dependence","authors":"Mauro González Vera,&nbsp;Pablo Marcelo Cometto,&nbsp;Juan Manuel Casañas,&nbsp;Glauco F. Bauerfeldt,&nbsp;Abdelwahid Mellouki","doi":"10.1002/poc.4555","DOIUrl":"10.1002/poc.4555","url":null,"abstract":"<p>In this work, the rate-determining steps of the OH radical + 3-bromopropene gas phase reaction were studied, which could explain for the possible negative activation energy observed in experiments. To obtain new kinetic parameters and data for critical revisions, a reinvestigation of the rate coefficient (<i>k</i>) and its temperature dependence was carried out using the PLP-LIF technique, in the 254- to 371-K range. Moreover, quantum-mechanical and canonical variational transition state theory calculations were performed, taking into consideration four OH addition and two β-hydrogen atom abstraction reaction channels. The proposed kinetic model fits to the observed experimental Arrhenius behavior, and three not negligible reaction pathways are described for the first time.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45499769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of external electric field on structure, spectra and various properties of 3-Chlorothieno[2,3-b]pyridine-2-carbonitrile using density functional theory 利用密度泛函理论研究外加电场对3 -氯噻吩[2,3 - b]吡啶- 2 -碳腈的结构、光谱和各种性质的影响
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-10 DOI: 10.1002/poc.4554
Tao Yaping, Su Mingzhu, Xu Renyong, Ai Jinfan, Zhang Weiying
{"title":"Influence of external electric field on structure, spectra and various properties of 3-Chlorothieno[2,3-b]pyridine-2-carbonitrile using density functional theory","authors":"Tao Yaping,&nbsp;Su Mingzhu,&nbsp;Xu Renyong,&nbsp;Ai Jinfan,&nbsp;Zhang Weiying","doi":"10.1002/poc.4554","DOIUrl":"10.1002/poc.4554","url":null,"abstract":"<p>Thiophene and pyridine compounds are widely used in medicine, pesticides, and material fields, and study of their physical and chemical changes under an external electric field (EEF) will improve a deep understanding of their properties. In this work, we selected 3-Chlorothieno[2,3-b]pyridine-2-carbonitrile (CPC) as the representative and explored the structure, total energy, dipole moment, Hirshfeld charge, molecular electrostatic potential, infrared, Raman, and UV-Vis spectra of CPC under EEF through density functional theory (DFT). The calculations indicated that the bond length, the bond angle, total energy, dipole moment, and energy gap of CPC are strongly affected by EEF. Infrared, Raman, and UV-Vis spectra showed stark vibration effects with increasing EFF. Our results provide a basis for further applications of CPC with and without EEF.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46308909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Designing of benzofuran-based monomers for photodetectors through similarity analysis and library enumeration 通过相似性分析和文库枚举设计苯并呋喃基光电探测器单体
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-09 DOI: 10.1002/poc.4553
Muhammad Saqib, Tayyaba Mubashir, Mudassir Hussain Tahir, Muqadas Javed, Asima Hameed, Asad Aziz, Shaban R. M. Sayed, Hosam O. El-ansary
{"title":"Designing of benzofuran-based monomers for photodetectors through similarity analysis and library enumeration","authors":"Muhammad Saqib,&nbsp;Tayyaba Mubashir,&nbsp;Mudassir Hussain Tahir,&nbsp;Muqadas Javed,&nbsp;Asima Hameed,&nbsp;Asad Aziz,&nbsp;Shaban R. M. Sayed,&nbsp;Hosam O. El-ansary","doi":"10.1002/poc.4553","DOIUrl":"10.1002/poc.4553","url":null,"abstract":"<p>Organic molecules have been extensively utilized in various applications including materials science, chemical, and biomedical fields. Traditionally, the design of organic molecules is achieved through experimental approaches, guided by conceptual insights, intuition, and experience. Although these experimental approaches have been successfully utilized to unveil various high-performance materials, these methods show serious limitations due to vast design space and the ever-increasing demand for organic molecules (new materials). Artificial intelligence with computer science is used by modern researchers to design materials with better performance and for predicting the properties of new materials. Herein, benzofuran-based building blocks are used as a standard molecule to search for new building blocks. Similarity analysis is performed to screen/search potential candidates for photodetectors based on the chemical structural similarity. Extended-connectivity fingerprints (ECFPs) are used for the similarity analysis. The virtual libraries of unique monomers are enumerated. The breaking retro-synthetically interesting chemical substructures (BRICS) method is also used to design building blocks by automatically decomposing and combining monomers in enumerated libraries. Moreover, this work offers a potential way to identify new monomers for photodetectors cost-effectively and rapidly.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42405830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical study on luminescence properties of a series of iridium complexes with high spin orbit coupling coefficients 一系列高自旋轨道耦合系数铱配合物发光特性的理论研究
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-08 DOI: 10.1002/poc.4552
Zheng-Kun Qin, Jia-Yu Yang, Xi-Lian Guo, Ye Ji, Yun-Kai Zhang, Zi-Cong Pan, Mei-Qi Wang, Ming-Xing Song
{"title":"Theoretical study on luminescence properties of a series of iridium complexes with high spin orbit coupling coefficients","authors":"Zheng-Kun Qin,&nbsp;Jia-Yu Yang,&nbsp;Xi-Lian Guo,&nbsp;Ye Ji,&nbsp;Yun-Kai Zhang,&nbsp;Zi-Cong Pan,&nbsp;Mei-Qi Wang,&nbsp;Ming-Xing Song","doi":"10.1002/poc.4552","DOIUrl":"10.1002/poc.4552","url":null,"abstract":"<p>In this paper, several Ir (III) complexes with transition metal as the central atom formed by the corresponding combination of two main ligands and three auxiliary ligands have been studied theoretically. The electronic structure, frontier molecular orbital, and spin orbit coupling data are used to analyze its application value in light emitting devices. The density functional theory is used to study (tbi)<sub>2</sub>Ir(bpp), (tbi-c)<sub>2</sub>Ir(bpp), (tbi)<sub>2</sub>Ir(dbm), (tbi-c)<sub>2</sub>Ir(dbm), (tbi)<sub>2</sub>Ir(pic), and (tbi-c)<sub>2</sub>Ir(pic). bpp = (2Z)-3-hydroxy-13-diphenylprop-2-en-1-one; dbm = 1,3-di-phenyl-1, 3-propanedione; pic = picolinate.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44912255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the nonexistent Nobel Prizes for two pioneers of modern physical organic chemistry: Sir Christopher K. Ingold and Saul Winstein† 现代物理有机化学的两位先驱——克里斯托弗·k·英戈尔德爵士和索尔·温斯坦——获得了不存在的诺贝尔奖
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-08 DOI: 10.1002/poc.4551
Jeffrey I. Seeman, Guillermo Restrepo
{"title":"On the nonexistent Nobel Prizes for two pioneers of modern physical organic chemistry: Sir Christopher K. Ingold and Saul Winstein†","authors":"Jeffrey I. Seeman,&nbsp;Guillermo Restrepo","doi":"10.1002/poc.4551","DOIUrl":"10.1002/poc.4551","url":null,"abstract":"<p>The careers of two pioneers of modern physical organic chemistry, Sir Christopher K. Ingold and Saul Winstein, are discussed and compared. Despite the fact that Ingold received 112 nominations from 77 nominees for the Nobel Prize in Chemistry (NPch), he never received that award. Winstein, also a non-recipient of the NPch, died prematurely at the age of 57. In his last 3 years, Winstein received 22 nominations from 18 nominators, seven of whom received or would receive the NPch themselves. Analyses of the Nobel Nomination Archive along with other evidence are used to explain Ingold's experience. A detailed examination of Winstein's career along with relevant historical data suggests that Winstein was a highly probable Nobelist had he lived just a few years longer. The relationship of Ingold's and Winstein's careers and the politics of the Nobel Prize selection process including the possibility that they would have shared a Nobel Prize are presented.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/poc.4551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45876998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrical conductivity and species distribution of aluminum chloride and 1-butyl-3-methylimidazolium chloride ionic liquid electrolytes 氯化铝和1 -丁基- 3 -甲基咪唑氯离子液体电解质的电导率和种类分布
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-07 DOI: 10.1002/poc.4549
Md Khalid Nahian, Ramana G. Reddy
{"title":"Electrical conductivity and species distribution of aluminum chloride and 1-butyl-3-methylimidazolium chloride ionic liquid electrolytes","authors":"Md Khalid Nahian,&nbsp;Ramana G. Reddy","doi":"10.1002/poc.4549","DOIUrl":"10.1002/poc.4549","url":null,"abstract":"<p>Electrical conductivity (<i>σ</i>) of aluminum chloride (AlCl<sub>3</sub>) and 1-butyl-3-methylimidazolium chloride (BMIC) ionic liquid (IL) was investigated as a function of temperature and AlCl<sub>3</sub> mole fraction (\u0000<math>\u0000 <msub>\u0000 <mi>X</mi>\u0000 <mrow>\u0000 <mi>AlC</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 </msub></math>). Electrochemical impedance spectroscopy was used to measure the electrical conductivity. Composition of AlCl<sub>3</sub>:BMIC ionic liquid was varied by changing the \u0000<math>\u0000 <msub>\u0000 <mi>X</mi>\u0000 <mrow>\u0000 <mi>AlC</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 </msub></math> from 0 to 0.67. The temperature was changed from 70°C to 110°C at 10°C intervals. It was found that the electrical conductivity increases with an increase in temperature. Electrical conductivity increases with \u0000<math>\u0000 <msub>\u0000 <mi>X</mi>\u0000 <mrow>\u0000 <mi>AlC</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 </msub></math> from 0 to 0.5 and then starts to decrease after \u0000<math>\u0000 <msub>\u0000 <mi>X</mi>\u0000 <mrow>\u0000 <mi>AlC</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 </msub></math> = 0.5. A species concentration profile was developed based on thermodynamic model at room temperature for the IL containing \u0000<math>\u0000 <msup>\u0000 <mi>BMI</mi>\u0000 <mo>+</mo>\u0000 </msup></math>, \u0000<math>\u0000 <msup>\u0000 <mi>Cl</mi>\u0000 <mo>−</mo>\u0000 </msup></math>, \u0000<math>\u0000 <mi>AlC</mi>\u0000 <msubsup>\u0000 <mi>l</mi>\u0000 <mn>4</mn>\u0000 <mo>−</mo>\u0000 </msubsup></math>, \u0000<math>\u0000 <mi>A</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <mi>C</mi>\u0000 <msubsup>\u0000 <mi>l</mi>\u0000 <mn>7</mn>\u0000 <mo>−</mo>\u0000 </msubsup></math>, \u0000<math>\u0000 <mi>A</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 <mi>C</mi>\u0000 <msubsup>\u0000 <mi>l</mi>\u0000 <mn>10</mn>\u0000 <mo>−</mo>\u0000 </msubsup></math>, \u0000<math>\u0000 <mi>A</mi>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>4</mn>\u0000 </msub>\u0000 <mi>C</mi>\u0000 <msubsup>\u0000 <mi>l</mi>\u0000 ","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46826893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Structure–activity relationship of alkanes and alkane derivatives for the abilities of C(sp3)H bonds toward their H-atom transfer reactions 烷烃及其衍生物对C(sp3)能力的构效关系H键的H原子转移反应
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-07 DOI: 10.1002/poc.4550
Yan-Hua Fu, Liguo Yang, Zhongyuan Zhou, Fang Wang, Guang-Bin Shen, Xiao-Qing Zhu
{"title":"Structure–activity relationship of alkanes and alkane derivatives for the abilities of C(sp3)H bonds toward their H-atom transfer reactions","authors":"Yan-Hua Fu,&nbsp;Liguo Yang,&nbsp;Zhongyuan Zhou,&nbsp;Fang Wang,&nbsp;Guang-Bin Shen,&nbsp;Xiao-Qing Zhu","doi":"10.1002/poc.4550","DOIUrl":"10.1002/poc.4550","url":null,"abstract":"<p>Hydrogen atom-donating ability of alkane is a research hotspot and has been extensively studied. In this article, the second-order rate constants of 20 hydrogen atom transfer (HAT) reactions between aliphatic, benzylic, and allylic alkanes and alkane derivatives with CumO<sup>•</sup> in acetonitrile at 298 K were studied. The thermo-kinetic parameter Δ<i>G</i><sup>≠o</sup>(XH), bond dissociation free energy Δ<i>G</i><sup>o</sup>(XH), and kinetic intrinsic resistance energy Δ<i>G</i><sup>≠</sup><sub>XH/X</sub> were determined and used to evaluate the H-donating abilities of these substrates in thermodynamics, kinetics, and HAT reactions. Structure–activity relationships including the factors (electronic, stereoelectronic, and steric effects), introduction of <span></span>CH<sub>3</sub>, <span></span>Ph, or <span></span>Cl in alkanes, and introduction of <i>N</i> atom in cycloalkane were discussed carefully. The results show that the order of H-donating abilities is allylic alkanes &gt; cycloalkanes &gt; chain alkanes ≈ benzylic alkanes &gt; haloalkanes. The introduction of <span></span>CH<sub>3</sub>, <span></span>Ph, or <span></span>Cl in alkanes and the introduction of <i>N</i> atom to the carbon ring reduce Δ<i>G</i><sup>o</sup>(XH) but increase Δ<i>G</i><sup>≠</sup><sub>XH/X</sub>, and Δ<i>G</i><sup>≠o</sup>(XH) is the synthesis result of these two parameters. The reliability of Δ<i>G</i><sup>≠o</sup>(XH) was verified, and the accuracy and reliability of the parameters were proved. Through the study of this paper, not only the Δ<i>G</i><sup>o</sup>(XH), Δ<i>G</i><sup>≠</sup><sub>XH/X</sub>, and Δ<i>G</i><sup>≠o</sup>(XH) of these alkanes and derivatives in HAT reaction can be quantitatively evaluated but also the structure–activity relationship of alkane is clearly researched.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48753874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RETRACTED:Exploring the intermolecular interactions in carbon disulfide dimer: An ab initio study using an improved Lennard–Jones potential energy surface for physical insights 探索二硫化碳二聚体中的分子间相互作用:利用改进的Lennard–Jones势能面进行的从头算研究
IF 1.8 4区 化学
Journal of Physical Organic Chemistry Pub Date : 2023-06-05 DOI: 10.1002/poc.4548
Waqas Amber Gill, Muhammad Usman Khan, Zunaira Shafiq, Muhammad Ramzan Saeed Ashraf Janjua
{"title":"RETRACTED:Exploring the intermolecular interactions in carbon disulfide dimer: An ab initio study using an improved Lennard–Jones potential energy surface for physical insights","authors":"Waqas Amber Gill,&nbsp;Muhammad Usman Khan,&nbsp;Zunaira Shafiq,&nbsp;Muhammad Ramzan Saeed Ashraf Janjua","doi":"10.1002/poc.4548","DOIUrl":"10.1002/poc.4548","url":null,"abstract":"<p>Carbon disulfide dimer (CS<sub>2</sub>)<sub>2</sub> is a model system that has been widely studied in the field of computational chemistry because of its relevance to a variety of chemical and biological processes. The (CS<sub>2</sub>)<sub>2</sub> dimer is a relatively simple molecular system composed of two carbon disulfide (CS<sub>2</sub>) molecules interacting with each other through intermolecular forces. Despite its apparent simplicity, the (CS<sub>2</sub>)<sub>2</sub> dimer exhibits a rich array of structural and dynamical properties that are of great interest to researchers. In this research, we present an ab initio study of the intermolecular interactions in the carbon disulfide dimer (CS<sub>2</sub>)<sub>2</sub> using an improved Lennard–Jones (ILJ) potential with CCSD(T)/QZVPP calculations. The potential energy surface of (CS<sub>2</sub>)<sub>2</sub> is calculated using high-level quantum mechanical calculations based on the CCSD(T)/def2-qzvpp method, which accurately accounts for electron correlation effects. The resulting potential energy surface is then fitted to an ILJ potential energy function, which includes both long-range dipole–dipole interactions and short-range repulsive interactions. The calculated potential energy surface reveals a rich variety of structural and dynamical properties of (CS<sub>2</sub>)<sub>2</sub>, including multiple minima and saddle points, which are sensitive to the relative orientation of the two CS<sub>2</sub> molecules. It is essential to use extended basis sets to accurately incorporate the significant quadrupole moment of CS<sub>2</sub>, which we have calculated to be 2.44 a.u. The results of this study demonstrate the importance of using high-level ab initio methods for the accurate calculation of potential energy surfaces in complex molecular systems such as (CS<sub>2</sub>)<sub>2</sub>. The use of an ILJ potential, which takes into account both dipole–dipole interactions and short-range repulsive interactions, provides a more accurate and efficient approach for modeling intermolecular interactions in (CS<sub>2</sub>)<sub>2</sub> and other similar systems. The results of this study will be useful for understanding the behavior of carbon disulfide dimers in different environments and for the development of new materials and chemical processes.</p>","PeriodicalId":16829,"journal":{"name":"Journal of Physical Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48972184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信