Select Subject

All (8830)

Agronomy (158)

Animal Husbandry,... (64)

Aquatic Science (16)

Astronomy (36)

Aviation (22)

Basic Medicine (184)

Biology (504)

Chemical Engineering (103)

Chemistry (635)

Civil and Archite... (105)

Clinical Medicine (236)

Computer Science ... (924)

Dynamic and Elect... (121)

Earth Science (119)

Economics (67)

Education (31)

Electrics, Commun... (927)

Energy Science an... (67)

Engineering and T... (15)

Environmental Sci... (140)

Food Science and ... (63)

Forestry (36)

Hydraulic Enginee... (40)

Mechanics (240)

Metallurgical Eng... (32)

Mine Engineering ... (38)

Nuclear Science a... (21)

Pharmacy (98)

Physics (920)

Preventive Medici... (37)

Psychology (20)

Security Science ... (17)

Sports Science (6)

Surveying and Map... (15)

Textile Science a... (16)

Traditional Chine... (56)

Transportation En... (57)

Select/Unselect all

For Selected Papers

Saved Papers

Please enter a name for this paper to be shown in your personalized Saved Papers list


	1. Rules of Two-Photon Concerted Photochemical Pericyclic Reactions and Its Difference from Woodward-Hoffman Rules for One-Photon Cases
	ZHANG Xian-Fu
	Chemistry 19 March 2013
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A two-photon (with frequency v) reaction (TPR) is compared with its corresponding one-photon (with frequency 2v) counterpart (OPR) both experimentally and theoretically. TPR often yields different products from its OPR, suggesting Woodward-Hoffman Rules do not apply for TPR. To explain the difference, it is proposed that Hudson-Kohler state of polyenes (HKSP), rather than the state in Huckel molecular orbital theory, acts as the lowest-lying excited state for the two-photon absorption (TPA) involved in TPR. The selection rules for pericyclic TPR are derived based on the symmetry of HKSP and frontier orbital theory.
	TO cite this article:ZHANG Xian-Fu. Rules of Two-Photon Concerted Photochemical Pericyclic Reactions and Its Difference from Woodward-Hoffman Rules for One-Photon Cases[OL].[19 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4528316


	2. Synthesis, crystal structure and Third-order nonlinear optical properties of 4-N,N- dimethylamino -4’-N’- 9-methanoanthracene-stilbazolium tetraphenylborate
	Qian Zhang,Liu Zhaodi,Liu Huijun,Wu Jieying,Zhou Hongpin,Yang Jiaxiang,Tian Yupeng
	Chemistry 29 March 2010
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A novel substituent styryl pyridinium tetraphenylborate, 4-N,N- dimethylamino -4’-N’- 9-methanoanthracene-stilbazolium tetraphenylborate, has been synthesized and characterized by IR spectrum and X-ray single-crystal diffraction. The complex crystallizes in monoclinic space group P21/c with a = 1.2557 (1) nm, b = 1.539(1) nm, c = 2.2202 (8) nm, β =101.099(1) °, and V = 4.2105(4) nm3, Z = 4, Dc = 1.159 g•cm-3. In the title molecule, the pyridyl ring of the cation makes dihedral angle of 2.8° with the phenyl ring. The nonlinear optical properties of the compound were investigated by virtue of 1064 nm nanosecond laser beam, and the results show that the novel pyridinium salt has a TPA coefficient of β= 0.028 cm/GW, a TPA cross-section of σ= 8.68×10-48 cm4•s•photon-1.
	TO cite this article:Qian Zhang,Liu Zhaodi,Liu Huijun, et al. Synthesis, crystal structure and Third-order nonlinear optical properties of 4-N,N- dimethylamino -4’-N’- 9-methanoanthracene-stilbazolium tetraphenylborate [OL].[29 March 2010] http://en.paper.edu.cn/en_releasepaper/content/41244


	3. β cyclodextrin-induced Fluorescence Enhancement of a Thermal- Responsive Azobenzene Modified Polydiacetylene Vesicles for a Temperature Sensor
	Chen Xin,Jiang Hao,Wang Yali,Zou Gang,Zhang Qijin
	Chemistry 07 August 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Herein, azobenzene modified polydiacetylene (PDA) vesicles with linear temperature dependence of fluorescence intensity had been fabricated successfully, and photo-controlled inclusion and exclusion reaction with β-cyclodextrin were used to act as driving force to induce fluorescence change of above azobenzene substituted PDA based vesicles.
	TO cite this article:Chen Xin,Jiang Hao,Wang Yali, et al. β cyclodextrin-induced Fluorescence Enhancement of a Thermal- Responsive Azobenzene Modified Polydiacetylene Vesicles for a Temperature Sensor[OL].[ 7 August 2009] http://en.paper.edu.cn/en_releasepaper/content/34346


	4. Tris(N-pyrrolidinyl)phosphine Substituted Diiron Dithiolate Related to Iron-only Hydrogenase Active Site: Synthesis, Characterization and Electrochemical Properties
	Hou Jun ,Peng Xiaojun ,Zhou Zhiyou ,Sun Shigang ,Zhao Xing,Gao Shang
	Chemistry 13 November 2006
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A tris(N-pyrrolidinyl)phosphine (P(NC4H8)3) monosubstituted complex, [(μ-pdt)Fe2(CO)5P(NC4H8)3], 2, was synthesized as a functional model of the hydrogen-producing capability of the iron hydrogenase active site. The structure was fully characterized by X-ray crystallography. IR and electrochemical studies have indicated that the (P(NC4H8)3) ligand has better electron-donating ability than that of those phosphine ligands, such as PMe3, PTA ( 1, 3, 5-triaza-7-phosphaadamantane), PMe2Ph PPh3, and P(OEt)3. The electrocatalytic activity of 2 was recorded in CH3CN in the absence and presence of weak acid, HOAc. The cathodic shift of potential at –1.98 V and the dependence of current on acid concentration have indicated that complex 2 can catalyze the reduction of protons to hydrogen at its Fe0FeI level in the presence of HOAc.
	TO cite this article:Hou Jun ,Peng Xiaojun ,Zhou Zhiyou , et al. Tris(N-pyrrolidinyl)phosphine Substituted Diiron Dithiolate Related to Iron-only Hydrogenase Active Site: Synthesis, Characterization and Electrochemical Properties[OL].[13 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9499


	5. A Binuclear Isocyanide Iron Azadithiolate Relevant to the Active Site of Fe-Only Hydrogenases: Synthesis, Structure and Electrochemical Properties
	Hou Jun ,Peng Xiaojun ,Liu Jifeng ,Gao Yunling ,Zhao Xing ,Gao Shang ,Han Keli
	Chemistry 13 November 2006
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Diiron complexes 3 and 5 as mimics for the active site of the Fe-only hydrogenases have been synthesized. The structures were fully characterized by X-ray crystallography. The 4-iodophenylisocyanide ligands in 5 are in basal positions and are nearly parallel to each other, showing the π-π stacking interactions. The electrochemical properties of complexes 3 and 5 were investigated by cyclic voltammetry.
	TO cite this article:Hou Jun ,Peng Xiaojun ,Liu Jifeng , et al. A Binuclear Isocyanide Iron Azadithiolate Relevant to the Active Site of Fe-Only Hydrogenases: Synthesis, Structure and Electrochemical Properties[OL].[13 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9493

Select/Unselect all

For Selected Papers

Saved Papers

Please enter a name for this paper to be shown in your personalized Saved Papers list

Rank

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.

	Check out RSS, or use RSS reader to subscribe this item