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You searched for: Journal Chemical communications Remove constraint Journal: Chemical communications Publication Year 2014 Remove constraint Publication Year: 2014 Source 2014 v.50 no.17 Remove constraint Source: 2014 v.50 no.17
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1. Acceptor–acceptor type isoindigo-based copolymers for high-performance n-channel field-effect transistors

Author:
KimThese two authors contributed equally to this work., Gyoungsik; Han, A-Reum; Lee, Hae Rang; Lee, Junghoon; Oh, Joon Hak; Yang, Changduk
Source:
Chemical communications 2014 v.50 no.17 pp. 2180-2183
ISSN:
1364-548X
Subject:
chemical reactions; composite polymers; lactams; transistors
Abstract:
... Two acceptor–acceptor (A–A) type copolymers (PIIG-BT and PIIG-TPD) with backbones composed exclusively of electron-deficient units are designed and synthesized. Both copolymers show unipolar n-type operations. In particular, PIIG-BT shows electron mobility of up to 0.22 cm² V⁻¹ s⁻¹. This is a record value for n-type copolymers based on lactam cores. ...
DOI:
10.1039/c3cc48013e

2. A cyano-bridged single-chain magnet featuring alternate high- and low-spin manganese(iii) porphyrins

Author:
Chen, Xi; Wu, Shu-Qi; Cui, Ai-Li; Kou, Hui-Zhong
Source:
Chemical communications 2014 v.50 no.17 pp. 2120-2122
ISSN:
1364-548X
Subject:
chemical communication; chemical reactions; ferromagnetism; ions; magnetic materials; manganese; porphyrins
Abstract:
... The chains in complex [Mn(TPP)][Mn(TPP)(CN)₂] (H₂TPP = meso-tetra(4-phenyl)-porphyrin) demonstrate perfect linearity, and are well isolated with the nearest interchain Mn–Mn separation of 12.95 Å. Ferromagnetic coupling is present among adjacent Mn(iii) ions, and single-chain magnet (SCM) behaviour is verified. ...
DOI:
10.1039/c3cc48117d

3. A [2+2+2] cyclization strategy for the synthesis of phosphorus embedding [6]helicene-like structures

Author:
Aillard, Paul; Retailleau, Pascal; Voituriez, Arnaud; Marinetti, Angela
Source:
Chemical communications 2014 v.50 no.17 pp. 2199-2201
ISSN:
1364-548X
Subject:
X-ray diffraction; chemical communication; chemical reactions; enantiomers; helicenes; nickel; phosphorus
Abstract:
... A Ni(0) promoted intramolecular [2+2+2] cyclotrimerization of triynes provides suitable access to a new series of phosphorus embedding helicenes. [6]Oxahelicenes in which the helical sequence terminates with a phosphole oxide unit have been prepared in both racemic and enantiopure forms and characterized by X-ray diffraction studies. ...
DOI:
10.1039/c3cc48943d

4. A mononuclear cobalt complex with an organic ligand acting as a precatalyst for efficient visible light-driven water oxidation

Author:
Fu, Shao; Liu, Yongdong; Ding, Yong; Du, Xiaoqiang; Song, Fangyuan; Xiang, Rui; Ma, Baochun
Source:
Chemical communications 2014 v.50 no.17 pp. 2167-2169
ISSN:
1364-548X
Subject:
catalysts; cobalt; ligands; oxidation; pH; perchlorates; photosensitizing agents
Abstract:
... N,N′-Bis(salicylidene)ethylenediaminecobalt(ii) (1) has been investigated as a highly efficient water oxidation precatalyst with a TON of 854 at pH = 9.0, using [Ru(bpy)₃](ClO₄)₂ as a photosensitizer and Na₂S₂O₈ as a sacrificial electron acceptor. ...
DOI:
10.1039/c3cc48059c

5. An unsupported metal hydroxide for the design of molecular μ-oxo bridged heterobimetallic complexes

Author:
Falzone, A. J.; Nguyen, J.; Weare, W. W.; Sommer, R. D.; Boyle, P. D.
Source:
Chemical communications 2014 v.50 no.17 pp. 2139-2141
ISSN:
1364-548X
Subject:
absorbance; chemical reactions; chromium
Abstract:
... A terminal and unsupported chromium(iii) hydroxide is reported. The terminal hydroxide is used to synthesize the first example of a heterobimetallic Ti–O–Cr compound containing an unsupported μ-oxo bridge. The heterobimetallic complex exhibits a new absorbance at 288 nm (4.32 eV), which is assigned to a metal-to-metal charge transfer (MMCT) transition. ...
DOI:
10.1039/c3cc49066a

6. A one-pot septanoside formation and glycosylation of acyclic dithioacetals derived from 1,2-cyclopropanated sugars

Author:
Venukumar, Patteti; Sudharani, Chalapala; Sridhar, Perali Ramu
Source:
Chemical communications 2014 v.50 no.17 pp. 2218-2221
ISSN:
1364-548X
Subject:
glycosylation; stereoselectivity; sugars; thiols
Abstract:
... Ring opening of 3-oxo-1,2-cyclopropanated sugars with thiols leads to the serendipitous discovery of the synthesis of sugar based homologated acyclic dithioacetals. These acyclic dithioacetals were found to undergo one-pot septanoside formation followed by stereoselective glycosylation in the presence of glycosyl acceptors under glycosylation reaction conditions. ...
DOI:
10.1039/c3cc49116a

7. A series of logic gates based on electrochemical reduction of Pb²⁺ in self-assembled G-quadruplex on the gold electrode

Author:
Zhai, Wei; Du, Chunyan; Li, Xiaohong
Source:
Chemical communications 2014 v.50 no.17 pp. 2093-2095
ISSN:
1364-548X
Subject:
DNA; chemical reactions; electrochemistry; electrodes; gold; lead
Abstract:
... Direct reduction of Pb²⁺ in self-assembled G-quadruplex on the gold electrode was first observed, which was applied in constructing a series of simple and reversible logic gates, such as one-input, two-input and three-input logic gates. Importantly, the largest scale of reversibility among two-input logic gates was achieved based on the reciprocal transformations of DNA. ...
DOI:
10.1039/c3cc47763k

8. Catalytic asymmetric [3+2] cycloaddition of aromatic aldehydes with oxiranes by C–C bond cleavage of epoxides: highly efficient synthesis of chiral 1,3-dioxolanes

Author:
Chen, Weiliang; Lin, Lili; Cai, Yunfei; Xia, Yong; Cao, Weidi; Liu, Xiaohua; Feng, Xiaoming
Source:
Chemical communications 2014 v.50 no.17 pp. 2161-2163
ISSN:
1364-548X
Subject:
aldehydes; aromatic compounds; catalytic activity; chemical bonding; chemical communication; cleavage (chemistry); cycloaddition reactions; diastereoselectivity; enantioselectivity; epoxides; epoxy compounds; models
Abstract:
... A novel and efficient N,N′-dioxide–Gd(iii) complex was developed for the highly diastereo- and enantioselective [3+2] cycloaddition of aryl oxiranyl diketones and aldehydes via C–C bond cleavage of oxiranes. The corresponding chiral 1,3-dioxolanes were obtained in excellent yields (up to 99%) with high diastereoselectivities (>95 : 5 dr) and enantioselectivities (up to 91% ee). Moreover, a possibl ...
DOI:
10.1039/c3cc48606k

9. Consistent changes in electronic states and photocatalytic activities of metal (Au, Pd, Pt)-modified TiO₂ studied by far-ultraviolet spectroscopy

Author:
Tanabe, Ichiro; Ozaki, Yukihiro
Source:
Chemical communications 2014 v.50 no.17 pp. 2117-2119
ISSN:
1364-548X
Subject:
chemical communication; gold; nanogold; nanoparticles; palladium; photocatalysis; platinum; spectral analysis; spectrometers; spectroscopy; titanium dioxide; ultraviolet radiation
Abstract:
... Absorption spectra (150–300 nm) of TiO₂ and TiO₂ modified with metal (Pt, Pd, and Au) nanoparticles were systematically measured using an attenuated total reflection–far ultraviolet spectrometer. The deposition of metal nanoparticles altered the spectral shape and intensity, indicating changes in the electronic states and photocatalytic activities of TiO₂. ...
DOI:
10.1039/c3cc48446g

10. Coordination ligand exchange of a xanthene probe–Ce(iii) complex for selective fluorescence sensing of inorganic pyrophosphate

Author:
Kittiloespaisan, Ekkachai; Takashima, Ippei; Kiatpathomchai, Wansika; Wongkongkatep, Jirarut; Ojida, Akio
Source:
Chemical communications 2014 v.50 no.17 pp. 2126-2128
ISSN:
1364-548X
Subject:
DNA; catalytic activity; chemical communication; chemical reactions; fluorescence; ligands; loop-mediated isothermal amplification; xanthenes
Abstract:
... A fluorescence sensing system for inorganic pyrophosphate based on ligand exchange of the Ce(iii) complex of a xanthene-type probe is developed. This sensing system is successfully applied to the fluorescence detection of polymerase-catalyzed DNA amplification using loop-mediated isothermal amplification. ...
DOI:
10.1039/c3cc48101h

11. Dinuclear ruthenium(ii) polypyridyl complexes as single and two-photon luminescence cellular imaging probes

Author:
Xu, Wenchao; Zuo, Jiarui; Wang, Lili; Ji, Liangnian; Chao, Hui
Source:
Chemical communications 2014 v.50 no.17 pp. 2123-2125
ISSN:
1364-548X
Subject:
chemical communication; chemical reactions; image analysis; luminescence; pH; photostability; ruthenium; water solubility
Abstract:
... A new series of dinuclear ruthenium(ii) polypyridyl complexes, which possess larger π-conjugated systems, good water solubility and pH resistance, and high photostability, were developed to act as single and two-photon luminescence cellular imaging probes. ...
DOI:
10.1039/c3cc48916g

12. Direct visualization of initial SEI morphology and growth kinetics during lithium deposition by in situ electrochemical transmission electron microscopy

Author:
Sacci, Robert L.; Dudney, Nancy J.; More, Karren L.; Parent, Lucas R.; Arslan, Ilke; Browning, Nigel D.; Unocic, Raymond R.
Source:
Chemical communications 2014 v.50 no.17 pp. 2104-2107
ISSN:
1364-548X
Subject:
batteries; chemical reactions; electrochemistry; electrolytes; gold; growth models; lithium; transmission electron microscopy
Abstract:
... Deposition of Li is a major safety concern existing in Li-ion secondary batteries. Here we perform the first in situ high spatial resolution measurement coupled with real-time quantitative electrochemistry to characterize SEI formation on gold using a standard battery electrolyte. We demonstrate that a dendritic SEI forms prior to Li deposition and that it remains on the surface after Li electrodi ...
DOI:
10.1039/c3cc49029g

13. Discovering the pivotal role of carbonate in the formation of a bis-phenolate supported Co₁₅ cluster

Author:
McLellan, Ross; Rezé, Julien; Taylor, Stephanie M.; McIntosh, Ruaraidh D.; Brechin, Euan K.; Dalgarno, Scott J.
Source:
Chemical communications 2014 v.50 no.17 pp. 2202-2204
ISSN:
1364-548X
Subject:
anions; aromatic hydrocarbons; carbonates; chemical reactions; ligands
Abstract:
... Unexpected panelling by μ₆-CO₃²⁻ anions has been observed to support the formation of a new and unusual Co₁₅ cluster. The arrangement is further stabilised by bis-phenolate ligands which assemble in a manner akin to tetrahomodioxacalix[4]arene. The reaction proceeds in very low yield as μ₆-CO₃²⁻ anions are formed in situ, but targeted synthesis by addition of carbonate improves synthetic yield and ...
DOI:
10.1039/c4cc00167b

14. Double Smiles rearrangement of Passerini adducts towards benzoxazinones

Author:
Martinand-Lurin, E.; Dos Santos, A.; El Kaim, L.; Grimaud, L.; Retailleau, P.
Source:
Chemical communications 2014 v.50 no.17 pp. 2214-2217
ISSN:
1364-548X
Subject:
X-ray diffraction; aromatic compounds; benzoxazinoids; chemical reactions
Abstract:
... A new straightforward access to benzoxazinones based on a three-component coupling is presented here. The mechanism of the whole process involves a double aryl transfer as clearly underlined by the X-ray diffraction analysis of the products. ...
DOI:
10.1039/c3cc49022j

15. Dramatic reduction in the activation barrier for dinitrogen splitting using amine–borane as a hydrogen carrier: insights from the DFT study

Author:
Malakar, Tanmay; Paul, Ankan
Source:
Chemical communications 2014 v.50 no.17 pp. 2187-2189
ISSN:
1364-548X
Subject:
Gibbs free energy; chemical communication; chemical reactions; dissociation; hydrogen; nitrogen; silica; tantalum; temperature
Abstract:
... DFT based mechanistic investigations on a silica surface supported Tantalum system reveal that there is a significant reduction in the free energy activation barrier for NN bond dissociation upon using a suitable amine–borane as a hydrogenating agent as compared to that of using molecular H₂ for the same purpose, which suggests that dinitrogen dissociation can be achieved in surface chemistry at ...
DOI:
10.1039/c3cc48285e

16. Efficient synthesis of chiral cyclic acetals by metal and Brønsted acid co-catalyzed enantioselective four-component cascade reactions

Author:
Qiu, Lin; Guo, Xin; Ma, Chaoqun; Qiu, Huang; Liu, Shunying; Yang, Liping; Hu, Wenhao
Source:
Chemical communications 2014 v.50 no.17 pp. 2196-2198
ISSN:
1364-548X
Subject:
Bronsted acids; catalytic activity; chemical reactions; diastereoselectivity; enantioselectivity
Abstract:
... Four-component Mannich reactions subsequently followed by an intramolecular oxo-Michael addition were developed to efficiently produce chiral cyclic acetals with high diastereoselectivity and enantioselectivity. ...
DOI:
10.1039/c3cc49063g

17. Efficient synthesis of narrowly dispersed hydrophilic and magnetic molecularly imprinted polymer microspheres with excellent molecular recognition ability in a real biological sample

Author:
Zhao, Man; Zhang, Cong; Zhang, Ying; Guo, Xianzhi; Yan, Husheng; Zhang, Huiqi
Source:
Chemical communications 2014 v.50 no.17 pp. 2208-2210
ISSN:
1364-548X
Subject:
chemical reactions; hydrophilicity; magnetism; microparticles; molecular imprinting; polymers
Abstract:
... A facile and highly efficient approach to obtain narrowly dispersed hydrophilic and magnetic molecularly imprinted polymer microspheres with molecular recognition ability in a real biological sample as good as what they show in the organic solvent-based media is described for the first time. ...
DOI:
10.1039/c3cc49131e

18. Facile fabrication of crack-free large-area 2D WO₃ inverse opal films by a ‘dynamic hard-template’ strategy on ITO substrates

Author:
Li, Hua; Thériault, Jolaine; Rousselle, Bruno; Subramanian, Balaji; Robichaud, Jacques; Djaoued, Yahia
Source:
Chemical communications 2014 v.50 no.17 pp. 2184-2186
ISSN:
1364-548X
Subject:
chemical communication; chemical reactions; electrodes; opal; tungsten oxide
Abstract:
... A ‘dynamic hard-template’ infiltration strategy for crack-free large-area synthesis of 2D WO₃ inverse opal (IO) films on ITO substrates using a wide range of sizes of sacrificial PS spheres is reported. Thus prepared WO₃ IO films were successfully used as an active electrode in the fabrication of an electrochromic device. ...
DOI:
10.1039/c3cc48558g

19. Formation, self-assembly and transformation of a transient selenotungstate building block into clusters, chains and macrocycles

Author:
CameronThese authors contributed equally towards the preparation of this manuscript., Jamie M.; Gao, Jing; Vilà-Nadal, Laia; Long, De-Liang; Cronin, Leroy
Source:
Chemical communications 2014 v.50 no.17 pp. 2155-2157
ISSN:
1364-548X
Subject:
chemical compounds; chemical reactions; mass spectrometry
Abstract:
... The one-pot syntheses of a series of dimeric and trimeric selenotungstates based on the [Se₂W₁₂O₄₆]¹²⁻ unit are presented alongside the structure of the tetrameric [Se₈W₄₈O₁₇₆]³²⁻ wheel. Mass spectrometry has probed the stability of these clusters whilst their electronic structure has been contrasted to their known phosphotungstate analogues. ...
DOI:
10.1039/c3cc49293a

20. From ruthenium olefin metathesis catalyst to (η⁵-3-phenylindenyl)hydrido complex via alcoholysis

Author:
Manzini, Simone; Nelson, David J.; Lebl, Tomas; Poater, Albert; Cavallo, Luigi; Slawin, Alexandra M. Z.; Nolan, Steven P.
Source:
Chemical communications 2014 v.50 no.17 pp. 2205-2207
ISSN:
1364-548X
Subject:
alcoholysis; catalysts; olefin; ruthenium
Abstract:
... The synthesis and characterisation of [Ru(H)(η⁵-3-phenylindenyl)(ⁱBu-Phoban)₂] 4 is reported (ⁱBu-Phoban = 9-isobutyl-9-phosphabicyclo-[3.3.1]-nonane). 4 is obtained via alcoholysis of metathesis pre-catalyst M₁₁, in a process that was previously thought to be limited to analogous complex [RuCl₂(PPh₃)₂(3-phenylindenylidene)] (M₁₀). ...
DOI:
10.1039/c3cc49481k