量子Monte Carlo处理激发态

提出了用于电子激发态的剩余函数变分量子ＭｏｎｔｅＣａｒｌｏ（ＳＦＶＭＣ）方法,已经证明：若激发态的初始波函数与基态的初始波函数属于对称性不同的不可约表示时,该激发态的ＳＦＶＭＣ方法与基态的ＳＦＶＭＣ方法完全相同;若激发态的初始波函数与基态的初始波函数有相同的对称性时,只要对激发态的初始波函数作正交性修正,则其态的ＳＦＶＭＣ方法亦可推到该激发态的情况。文章导出了这第二类激发态的ＳＦＶＭＣ方法的详细计     

载锰活性碳纤维SACF—Mn的制备及对乙基硫醇的吸附性能研究：Ⅱ …

研究了ＳＡＣＦ－Ｍｎ对乙基硫醇的吸附性能。发现ＳＡＣＦ－Ｍｎ对乙基硫醇的吸附性能与ＳＡＣＦ－Ｍｎ的制备条件密切相关。ＳＡＣＦ－Ｍｎ对乙基硫醇的吸附，特别对汔油中硫醇的吸附性能优异于ＳＡＣＦ。     

载锰活性碳纤维SACF-Mn的制备及对乙基硫醇的吸附性能研究Ⅱ.-SACF-Mn对乙基硫醇的吸附性能研究

研究了ＳＡＣＦ－Ｍｎ对乙基硫醇的吸附性能。发现ＳＡＣＦ-Ｍｎ对乙基硫醇的吸附性能与ＳＡＣＦ－Ｍｎ的制备条件密切相关．ＳＡＣＦ－Ｍｎ对乙基硫醇的吸附，特别对汽油中硫醇的吸附性能优异于ＳＡＣＦ．     

SYNTHESIS,CRYSTAL STRUCTURE AND MAGNETISM OF THE COMPLEX:GdFe(CN)_64H_2O

ＳＹＮＴＨＥＳＩＳ，ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＡＮＤ　ＭＡＧＮＥＴＩＳＭ　ＯＦ　ＴＨＥ　ＣＯＭＰＬＥＸ：ＧｄＦｅ（ＣＮ）_６４Ｈ_２ＯＳＹＮＴＨＥＳＩＳ，ＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＡＮＤＭＡＧＮＥＴＩＳＭＯＦＴＨＥＣＯＭＰＬＥＸ：ＧｄＦ...     

COMPARISON OF CATALYTIC REACTIVITIES OF TRIPHENYL－PHOSPHINE COMPLEXES OF Ru，Rh，Pd，Fe，Co，Ni IN THE MALEIC ANHYDRIDE HYDROGENATION

ＣＯＭＰＡＲＩＳＯＮＯＦＣＡＴＡＬＹＴＩＣＲＥＡＣＴＩＶＩＴＩＥＳＯＦＴＲＩＰＨＥＮＹＬ－ＰＨＯＳＰＨＩＮＥＣＯＭＰＬＥＸＥＳＯＦＲｕ，Ｒｈ，Ｐｄ，Ｆｅ，Ｃｏ，ＮｉＩＮＴＨＥＭＡＬＥＩＣＡＮＨＹＤＲＩＤＥＨＹＤＲＯＧＥＮＡＴＩＯＮＣＯＭＰＡＲＩＳＯＮ...     

（四甲基二硅撑）双（3—三甲硅基环戊二烯基）—四羰基二铁…

标题化合物（Ｍｅ２ＳｉＳｉＭｅ２）〔η＾５－（３－Ｍｅ３ＳｉＣ５Ｈ３）Ｆｅ（ＣＯ）２〕２／（μ－ＣＯ）２（Ａ）分子中的Ｆｅ－Ｆｅ键被钠汞齐还原断裂，生成相应的双铁负离子，分别与ＭｅＣＯＣｌ、ＰｈＣＯＣｌ、ＰｈＣＨ２Ｃｌ、ＣｌＣＨ２ＣＯＯＣ２Ｈ５和Ｐｈ３ＳｎＣｌ进行亲核取代反应，生成在铁原子上引入相应取代基的产物（Ｍｅ２ＳｉＳｉＭｅ２）〔η＾５－（３－Ｍｅ３ＳｉＣ５Ｈ３）Ｆｅ（ＣＯ）２Ｒ〕２（Ｒ：Ｍ     

MICROCALORIMETRIC STUDIES OF SURFACE ACID/BASE PROPERTIES OF REDUCED IRON／MAGNESIUM CATALYSTS

ＭＩＣＲＯＣＡＬＯＲＩＭＥＴＲＩＣＳＴＵＤＩＥＳＯＦＳＵＲＦＡＣＥＡＣＩＤ／ＢＡＳＥＰＲＯＰＥＲＴＩＥＳＯＦＲＥＤＵＣＥＤＩＲＯＮ／ＭＡＧＮＥＳＩＵＭＣＡＴＡＬＹＳＴＳ＊ＴｕＭａｉ，ＳｈｅｎＪｉａｎｙｉ＊＊，ＣｈｅｎＹｉ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈ...     

超大孔Fe和V—Ti分子筛的合成

水热法合成了具有超大孔ＭＣＭ－４１分子筛结构的含Ｆｅ和Ｖ－Ｔｉ分子筛，通过ＸＲＤ，骨架ＩＲ，ＥＳＲ，＾２９ＳｉＭＡＳ ＮＭＲ，紫外漫反射等测试表征证实，Ｆｅ原子在ＦｅＭＣＭ－４１分子筛骨架上，Ｖ和Ｔｉ同是进入Ｖ－ＴｉＭＣＭ－４１分子筛骨架。     

ASYMMETRIC SYNTHESES OF STEREOTSOMERS OF SECODEMETHYLCLAUSENAMIDE

ＡＳＹＭＭＥＴＲＩＣ　ＳＹＮＴＨＥＳＥＳ　ＯＦ　ＳＴＥＲＥＯＴＳＯＭＥＲＳ　ＯＦ　ＳＥＣＯＤＥＭＥＴＨＹＬＣＬＡＵＳＥＮＡＭＩＤＥ￥ＪｉｎＦＳＤＵ；ＪｉｎＺＨＯＵａｎｄＬｉａｒＨＵＡＮＧ（ＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａＭｅｄｉｃａ，Ｃｈｉｎｅｓ...     

QUANTUM CHEMICAL STUDY ON THE MECHANISM OF PRODUCING OXYGENATES IN FISCHER－TROPSCH SYNTHESIS ON M／SiO＿2 （M＝Ni， Ru， Rh， Pd） CATALYSTS

ＱＵＡＮＴＵＭ　ＣＨＥＭＩＣＡＬ　ＳＴＵＤＹ　ＯＮ　ＴＨＥ　ＭＥＣＨＡＮＩＳＭ　ＯＦ　ＰＲＯＤＵＣＩＮＧ　ＯＸＹＧＥＮＡＴＥＳ　ＩＮ　ＦＩＳＣＨＥＲ－ＴＲＯＰＳＣＨ　ＳＹＮＴＨＥＳＩＳ　ＯＮ　Ｍ／ＳｉＯ＿２　（Ｍ＝Ｎｉ，　Ｒｕ，　Ｒｈ，　Ｐｄ）　ＣＡ...     

Stepwise laser photolysis studies of beta-bond cleavage in highly excited triplet states of biphenyl derivatives having C-O bonds

Photochemical profiles of beta-bond dissociation in highly excited triplet states (Tn) of biphenyl derivatives having C-O bonds were investigated in solution, using stepwise laser photolysis techniques. The lowest triplet states (T1) were produced by triplet sensitization of acetone (Ac) upon 308-nm laser photolysis. The molar absorption coefficients of the T1 states were determined using triplet sensitization techniques. Any photochemical reactions were absent in the T1 states. Upon 355-nm laser flash photolysis of the T1 states, they underwent fragmentation, because of homolysis of the C-O bond in the Tn states from the observations of the transient absorption of the corresponding radicals. The quantum yields (Phidec) for the decomposition of the T1 states upon the second 355-nm laser excitation were determined. Based on the Phidec values and the bond dissociation energies (BDEs) for the C-O bond fission, the state energies (ERT) of the reactive highly excited triplet states (TR) were determined. It was revealed that (i) the Phidec was related to the energy difference (DeltaE) between the BDE and the ERT, and (ii) the rate (kdis) of beta-cleavage in the TR state was formulated as being simply proportional to DeltaE. The reaction mechanism for beta-bond cleavage in the TR states was discussed.     

Determination of the ground- and excited-state dipole moments of 4’-(hexyloxy)-4-biphenylcarbonitrile and 4-isothiocyanatophenyl 4-pentylbicyclo [2,2,2] octane-1-carboxylate nematic liquid crystals and their mixtures

The dipole moments of the ground and excited states of 4′-(hexyloxy)-4-biphenylcarbonitrile and 4-isothiocyanatophenyl 4-pentylbicyclo [2.2.2] octane-1-carboxylate nematic liquid crystals and their mixtures prepared in chloroform and dichloromethane were studied at room temperature. The dipole moments of the ground states of the all samples were calculated according to the Guggenheim–Smith method. The dipole moments of their excited states were determined with the help of the Lippert equation by measuring the absorption and fluorescence spectra, solvent polarity and refractive index values. It was determined that dipole moments of the excited states were higher than those of the ground states. Moreover, the dipole moments of the ground and excited states of two nematic liquid crystals were also estimated by using molecular mechanic method (Gaussian09 program (DFT/B3LYP 6-31G(dp)). The results obtained are interpreted in detail.     

Extensive ab initio study of the valence and low-lying Rydberg states of BBr including spin-orbit coupling

The electronic states of the BBr molecule, including 12 valence states and 12 low-lying Rydberg states, have been studied at the theoretical level of MR-CISD+Q with all-electron aug-cc-pVQZ basis sets and Douglas-Kroll [Ann. Phys. (N.Y.) 82, 89 (1974)] scalar relativistic correction. The spin-orbit coupling effect in the valence states was calculated by the state interaction approach with the full Breit-Pauli Hamiltonian. This is the first multireference ab initio study of the excited electronic states of BBr. Potential energy curves of all states were plotted with the help of the avoided crossing rule between electronic states of the same symmetry. The structural properties of these states were analyzed. Computational results reproduced most experimental data well. The transition properties of the a (3)Pi(0(+) ), a (3)Pi(1), and A (1)Pi(1) states to the ground state X (1)Sigma(0(+) ) (+) transitions were obtained, including the transition dipole moments, the Franck-Condon factors, and the radiative lifetimes. The evaluated radiative lifetime of the a (3)Pi(0(+) ), and a (3)Pi(1) states are near 1 ms, much longer than that of the A (1)Pi(1) state.     

Multireference configuration interaction studies on the ground and excited states of N2O2: the potential energy curves of N2O2 along N-N distance

In this paper, the ground and excited states of N2O2 were studied at the multireference configuration interaction (MRCI) level of theory with Dunning's [J. Chem. Phys. 90, 1007 (1985); 96, 6796 (1992)] correlation consistent basis sets augo-cc-pVDZ and aug-cc-pVTZ. The geometry optimizations were performed for the ground state of N2O2. The vertical excitation energies and transition moments were calculated for the low-lying singlet states of N2O2 including the lowest three 1A1 states, two 1B1 states, one 1B2 state, and two 1A2 states at the MRCI level of theory with Dunning's correlation consistent basis sets aug-cc-pVDZ, aug-cc-pVTZ, and aug-cc-pVQZ. Furthermore, for the first time, the potential energy curves were calculated at the complete active space self-consistent-field and MRCI levels of theory for as many as 12 N2O2 singlet electronic states along the N-N distance. The dissociation asymptotes of these 12 N2O2 singlet electronic states were discussed.     

Extensive ab initio study of the electronic states of SCl including spin-orbit coupling

The effect of different basis sets for calculation of the spectroscopic constants of the ground state of sulfur monochloride (SCl) was analyzed using scalar relativistic multireference configuration interaction with single and double excitations plus Davidson correction. Then the generally contracted all-electronic correlation-consistent polarized valence quintuple zeta basis sets were selected to compute the electronic states of SCl including 12 valence and 9 Rydberg lambda-S states. The spin-orbit coupling effect was calculated via the state interaction approach with the full Breit-Pauli Hamiltonian. This effect splits these lambda-S states into 42 omega states. Potential-energy curves of all these states are plotted with the help of the avoided crossing rule between the electronic states of the same symmetry. The structural properties of these states are analyzed. Spectroscopic constants of bound excited states that have never been observed in experiment are obtained. The transition dipole moments and the Franck-Condon factors of several transitions from low-lying bound excited states to the ground state were also calculated.     

Ab initio study of the electronic states of BS including spin–orbit coupling

The entire 30 Ω states generated from the 12 valence and two Rydberg Λ–S states of the BS radical have been studied at the MR-CISD + Q level of theory for the first time. The effects of spin–orbit coupling and the avoided crossing rule between electronic states of the same symmetry were analyzed. Spectroscopic constants of several excited states that have never been observed in experiment were obtained. The transition properties of several low-lying bound excited states to ground state transitions, including the transition dipole moments and the Franck–Condon factors, were also calculated, from which the corresponding single-channel radiative lifetimes were derived.     

Electronic Structure and Catalysis on （001） Polar Surface of Cubic Zirconia

The electronic structure of (001) polar surface of cubic zirconia was studied by GGA(WC) approximation. We found the cubic lattice near (001) surface showed an intensive tendency to transfer to tetragonal lattice. The metallic state appeared on both the terminations. For O-termination, some O2p states were vacated and hole carriers concentrated on surface oxygen-ions. For Zr-ermination, some Zr4d states became partial occupied for the loss of O2p states. We observed the hole states were mainly localized at the corresponding ions on surface for both the terminations, while the charge states on Zr-termination were dispersed on surface.     

Study of Wave Functions and Radiation Transitions in a Rydberg Polar Cluster Using the Continuum Model

A continuum model describing highly excited (Rydberg) electronic states in clusters composed of polar molecules was proposed. On the basis of this model, the wave functions of Rydberg electronic states of clusters were calculated for a wide range of characteristic cluster parameters. These states are not hydrogen-like and can be described using the quantum defect theory. This fact indicates that radiative transitions can be forbidden within certain ranges of cluster parameters. The quantum defects in clusters and the lifetimes of different states were calculated. The possibility of formation of metastable Rydberg states and anomalous spectral characteristics of Rydberg clusters was shown.