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You searched for: Journal Chemical communications Remove constraint Journal: Chemical communications Publication Year 2018 Remove constraint Publication Year: 2018 Source 2018 v.54 no.85 Remove constraint Source: 2018 v.54 no.85
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1. A four-state fluorescent molecular switch

Author:
Liu, Yuan; Zhou, Jiawang; Wasielewski, Michael R.; Xing, Hang; Mirkin, Chad A.
Source:
Chemical communications 2018 v.54 no.85 pp. 12041-12044
ISSN:
1364-548X
Subject:
chemical reactions; coordination compounds; fluorescence; fluorescent dyes; moieties
Abstract:
... Four distinct fluorescent states are achieved in a single Weak-Link Approach (WLA) construct bearing pyrene and tetraphenylethene moieties. The fluorescence of the compound in both the solution and solid phases can be manipulated through reversible coordination chemistry at the Ptᴵᴵ center. ...
DOI:
10.1039/c8cc05159c

2. An efficient multifunctional hybrid electrocatalyst: Ni₂P nanoparticles on MOF-derived Co,N-doped porous carbon polyhedrons for oxygen reduction and water splitting

Author:
Sun, Tingting; Zhang, Shaolong; Xu, Lianbin; Wang, Dingsheng; Li, Yadong
Source:
Chemical communications 2018 v.54 no.85 pp. 12101-12104
ISSN:
1364-548X
Subject:
carbon; catalysts; chemical compounds; chemical reactions; fuel cells; hydrogen production; nanoparticles; oxygen; oxygen production; synergism
Abstract:
... Ni₂P nanoparticles anchored on MOF-derived Co,N-doped porous carbon polyhedrons (Ni₂P/CoN–PCP) were successfully prepared. The Ni₂P/CoN–PCP catalyst shows excellent trifunctional electrocatalytic performances for the oxygen reduction, oxygen evolution, and hydrogen evolution reactions, attributed to the synergistic effect between active Ni₂P nanoparticles and the CoN–PCP support with rich Co–Nₓ ce ...
DOI:
10.1039/c8cc06566g

3. A new strategy for constructing a disulfide-functionalized ZIF-8 analogue using structure-directing ligand–ligand covalent interaction

Author:
Gai, Yanli; Chen, Xitong; Yang, Huajun; Wang, Yanxiang; Bu, Xianhui; Feng, Pingyun
Source:
Chemical communications 2018 v.54 no.85 pp. 12109-12112
ISSN:
1364-548X
Subject:
adsorption; carbon dioxide; chemical reactions; disulfide bonds; ethane; ethylene; van der Waals forces
Abstract:
... Inter-ligand van der Waals forces play a key role in the synthesis of different ZIF types. Here we report an unusual case involving covalent inter-ligand interactions through disulfide bond formation in a ZIF-8 analogue. It exhibits high CO₂ uptake and stepwise adsorption of light hydrocarbons with potential applications in ethane/ethylene separation. ...
DOI:
10.1039/c8cc07064d

4. Benzoins and cyclobenzoins in supramolecular and polymer chemistry

Author:
Alrayyani, Maymounah; Miljanić, Ognjen Š.
Source:
Chemical communications 2018 v.54 no.85 pp. 11989-11997
ISSN:
1364-548X
Subject:
aldehydes; chemical bonding; derivatization; graphene; macrocyclic compounds; models; polymers
Abstract:
... Benzoin condensation is one of the oldest rigorously described organic reactions, having been discovered in 1832 by Liebig and Wöhler. It creates a new C–C bond and a stereocenter from ubiquitous aldehyde starting materials under simple cyanide-catalyzed conditions. We have recently discovered cyclobenzoins: a class of macrocyclic compounds prepared by a benzoin cyclooligomerization of simple arom ...
DOI:
10.1039/c8cc07407k

5. Bioinspired structural transition of synthetic polymers through biomolecular ligand binding

Author:
Suzuki, Seigo; Sawada, Toshiki; Ishizone, Takashi; Serizawa, Takeshi
Source:
Chemical communications 2018 v.54 no.85 pp. 12006-12009
ISSN:
1364-548X
Subject:
biopolymers; chemical reactions; ligands; peptides
Abstract:
... Inspired by ligand binding-triggered structural transition of biopolymers in living systems, we demonstrated the structural transition of thermoresponsive poly(N-isopropylacrylamide) through specific ligand binding of artificially evolved peptides to the polymer. ...
DOI:
10.1039/c8cc06232c

6. Conformational restraint as a strategy for navigating towards lysosomes

Author:
LiangThese authors contributed equally to this work., Xing-Guang; Cheng, Juan; Qin, Siyao; Shao, Ling-Xiao; Huang, Ming-Zhu; Wang, Gang; Han, Yifeng; Han, Feng; Li, Xin
Source:
Chemical communications 2018 v.54 no.85 pp. 12010-12013
ISSN:
1364-548X
Subject:
chemical reactions; coumarin; endoplasmic reticulum; formaldehyde; image analysis; lysosomes; protein folding
Abstract:
... Using the conformational restraint strategy, we developed a hydrazonate-derived coumarin into a lysosome targeting probe for imaging native formaldehyde at the subcellular level. Using this probe, we observed the overproduction of formaldehyde in lysosomes when cells were treated with endoplasmic reticulum (ER) stress inducers, suggesting the involvement of formaldehyde in protein misfolding. ...
DOI:
10.1039/c8cc06155f

7. Consecutive one-/two-step relaxation transformations of single-molecule magnets via coupling dinuclear dysprosium compounds with chloride bridges

Author:
Tian, Haiquan; Wang, Bao-Lin; Lu, Jing; Liu, Hou-Ting; Su, Jianhui; Li, Dacheng; Dou, Jianmin
Source:
Chemical communications 2018 v.54 no.85 pp. 12105-12108
ISSN:
1364-548X
Subject:
chemical reactions; dysprosium; magnetic materials
Abstract:
... The double chloride-bridged dimer of a dinuclear dysprosium(iii) single-molecule magnet (SMM) was successfully isolated by assembling centrosymmetric dinuclear Dy₂ SMMs. Such structural transformation involves the generation and cleavage of chloride bridges and leads to consecutive transformations of one- and two-step slow relaxation of magnetization. ...
DOI:
10.1039/c8cc06699j

8. Continuous flow biodiesel production from wet microalgae using a hybrid thin film microfluidic platform

Author:
Sitepu, Eko K.; Jones, Darryl B.; Tang, Youhong; Leterme, Sophie C.; Heimann, Kirsten; Zhang, Wei; Raston, Colin L.
Source:
Chemical communications 2018 v.54 no.85 pp. 12085-12088
ISSN:
1364-548X
Subject:
ambient temperature; biodiesel; chemical compounds; chemical reactions; cost effectiveness; films (materials); fuel production; microalgae
Abstract:
... A novel continuous flow turbo-thin film device (T²FD) has been developed. The microfluidic platform is effective in high yielding production of biodiesel from wet microalgae at room temperature under continuous flow conditions. These findings open the possibility of cost effective production of biodiesel directly from wet microalgae. ...
DOI:
10.1039/c8cc07610c

9. Copper-catalyzed propargylic [3+3] cycloaddition with 1H-pyrazol-5(4H)-ones: enantioselective access to optically active dihydropyrano[2,3-c]pyrazoles

Author:
Li, Ling; Liu, Zhen-Ting; Hu, Xiang-Ping
Source:
Chemical communications 2018 v.54 no.85 pp. 12033-12036
ISSN:
1364-548X
Subject:
catalytic activity; copper; cycloaddition reactions; enantioselectivity; pyrazoles
Abstract:
... A copper-catalyzed asymmetric propargylic [3+3] cycloaddition with 1H-pyrazol-5(4H)-ones as C,O-bisnucleophiles through the desilylation-activated strategy has been developed. With the catalysis of Cu(OAc)₂·H₂O in combination with a chiral tridentate P,N,N-ligand, the reaction displayed a broad substrate scope, and thus provided a variety of chiral dihydropyrano[2,3-c]pyrazoles in high yields and ...
DOI:
10.1039/c8cc05706k

10. Cyclic Pt₃Ag₃₃ and Pt₃Au₁₂Ag₂₁ nanoclusters with M₁₃ icosahedra as building-blocks

Author:
Yang, Sha; Chai, Jinsong; Lv, Ying; Chen, Tao; Wang, Shuxin; Yu, Haizhu; Zhu, Manzhou
Source:
Chemical communications 2018 v.54 no.85 pp. 12077-12080
ISSN:
1364-548X
Subject:
absorption; chemical compounds; chemical reactions; nanoparticles; photoluminescence
Abstract:
... In this work, we report a controlled self-assembly of three M₁₃ icosahedral building-blocks into cyclic Pt₃Ag₃₃ or Pt₃Au₁₂Ag₂₁ nanoclusters. Compared to the previously reported Pt₂Ag₂₃ and Pt₁Ag₁₂ nanoclusters, the Pt₃Ag₃₃ nanoclusters exhibit a red-shift in both the optical absorption and photoluminescence due to the assembly of an additional Pt₁Ag₁₂ icosahedron. ...
DOI:
10.1039/c8cc06900j

11. Direct monitoring of the conformational equilibria of the activation loop in the mitogen-activated protein kinase p38α

Author:
RoserP. R. and J. W. contributed equally., Patrick; Weisner, Jörn; Simard, Jeffrey R.; Rauh, Daniel; Drescher, Malte
Source:
Chemical communications 2018 v.54 no.85 pp. 12057-12060
ISSN:
1364-548X
Subject:
chemical compounds; conformational isomerization; mitogen-activated protein kinase; monitoring
Abstract:
... Conformational transitions in protein kinases are crucial for the biological function of these enzymes. Here, we characterize and assess conformational equilibria of the activation loop and the effect of small molecule inhibitors in the MAP kinase p38α. Our work experimentally revealed the existence of a two-state equilibrium for p38α while the addition of inhibitors shifts the equilibrium between ...
DOI:
10.1039/c8cc06128a

12. Exploring physicochemical space via a bioisostere of the trifluoromethyl and ethyl groups (BITE): attenuating lipophilicity in fluorinated analogues of Gilenya® for multiple sclerosis

Author:
Erdeljac, Nathalie; Kehr, Gerald; Ahlqvist, Marie; Knerr, Laurent; Gilmour, Ryan
Source:
Chemical communications 2018 v.54 no.85 pp. 12002-12005
ISSN:
1364-548X
Subject:
alkenes; chemical reactions; drugs; lipophilicity; moieties; sclerosis
Abstract:
... The direct, catalytic vicinal difluorination of terminal alkenes via an I(i)/I(iii) manifold was exploited to install a chiral, hybrid bioisostere of the CF₃ and Et groups (BITE) in Gilenya®; the first orally available drug for the clinical management of Multiple Sclerosis (MS). This subtle fluorination pattern allows lipophilicity (log D) to be tempered compared to the corresponding CF₃ and Et de ...
DOI:
10.1039/c8cc05643a

13. From double-shelled grids to supramolecular frameworks

Author:
Wu, Jianfeng; Guo, Mei; Li, Xiao-Lei; Zhao, Lang; Sun, Qing-Fu; Layfield, Richard A.; Tang, Jinkui
Source:
Chemical communications 2018 v.54 no.85 pp. 12097-12100
ISSN:
1364-548X
Subject:
chemical compounds; chemical reactions; hydrogen bonding; magnetic materials
Abstract:
... Structurally unique double-shelled 4f and 3d–4f supramolecular grids were constructed and assembled into 3D hydrogen-bonded organic frameworks (HOFs), with the 3d–4f heterometallic HOF showing single-molecule magnet (SMM) behaviour. ...
DOI:
10.1039/c8cc06411c

14. Intermolecular π-hole/n→π* interactions with carbon monoxide ligands in crystal structures

Author:
DoppertBoth authors contributed equally., Michael Timothy; van Overeem, Hannah; Mooibroek, Tiddo Jonathan
Source:
Chemical communications 2018 v.54 no.85 pp. 12049-12052
ISSN:
1364-548X
Subject:
carbon monoxide; chemical reactions; crystal structure; databases; ligands
Abstract:
... A thorough analysis of the Cambridge Structure Database reveals that intermolecular π-hole/n→π* interactions with carbon monoxide ligands are abundant in the solid state and somewhat directional, particularly with fac-like M(CO)₃ fragments (P < 4.0). High level DFT calculations suggest interacting energies up to about −10 kcal mol⁻¹ for adducts of charge neutral complexes. ...
DOI:
10.1039/c8cc07557c

15. LY2874455 potently inhibits FGFR gatekeeper mutants and overcomes mutation-based resistance

Author:
Wu, Daichao; Guo, Ming; Min, Xiaoli; Dai, Shuyan; Li, Meixiang; Tan, Sijie; Li, Guoqing; Chen, Xiaojuan; Ma, Yao; Li, Jun; Jiang, Longying; Qu, Lingzhi; Zhou, Zhan; Chen, Zhuchu; Chen, Lin; Xu, Guangyu; Chen, Yongheng
Source:
Chemical communications 2018 v.54 no.85 pp. 12089-12092
ISSN:
1364-548X
Subject:
X-ray diffraction; chemical compounds; chemical reactions; drug resistance; mutants; mutation
Abstract:
... The chemical compound LY2874455 has the potential to overcome drug resistance driven by FGFR gatekeeper mutations. X-ray crystallographic studies provide the structural explanation for why this compound is effective against the FGFR gatekeeper mutations. ...
DOI:
10.1039/c8cc07546h

16. Mesoporous S doped Fe–N–C materials as highly active oxygen reduction reaction catalyst

Author:
Guan, Zhi; Zhang, Xuejiang; Chen, Wenxing; Pei, Jiajing; Liu, Di; Xue, Yanrong; Zhu, Wei; Zhuang, Zhongbin
Source:
Chemical communications 2018 v.54 no.85 pp. 12073-12076
ISSN:
1364-548X
Subject:
batteries; carbon; catalysts; electrochemistry; iron; polymerization; porous media; pyrolysis
Abstract:
... Mesoporous Fe, S, N doped carbon (m-FeSNC) materials have been successfully synthesized by pyrolysis of polymerized o-phenylenediamine using binary initiators. It exhibited high electrocatalytic activity towards oxygen reduction reaction, and zinc–air battery with higher performance has been fabricated using m-FeSNC than using commercial Pt/C. ...
DOI:
10.1039/c8cc05273e

17. Ordered nanoporous lyotropic liquid crystal polymer resin for heterogeneous catalytic aerobic oxidation of alcohols

Author:
Dwulet, Gregory E.; Gin, Douglas L.
Source:
Chemical communications 2018 v.54 no.85 pp. 12053-12056
ISSN:
1364-548X
Subject:
aerobic conditions; alcohols; catalytic activity; liquid crystals; nanopores; oxidation; polymers
Abstract:
... An ordered, nanoporous, TEMPO-based polymer resin formed from lyotropic liquid crystal monomers catalyzes the hetereogeneous oxidation of alcohols with high activity and substrate size selectivity under transition-metal-free, aerobic conditions. ...
DOI:
10.1039/c8cc05661g

18. Organosoluble tetravalent actinide di- and trifluorides

Author:
Gotthelf, Garret; Stuber, Matthew A.; Kornienko, Anna Y.; Emge, Thomas J.; Brennan, John G.
Source:
Chemical communications 2018 v.54 no.85 pp. 12018-12020
ISSN:
1364-548X
Subject:
actinides; chemical reactions; fluorides; ligands; silver; temperature
Abstract:
... Soluble molecular actinide(iv) fluorides can be prepared in high yield via redox or metathesis reactions of silver fluorides with actinide compounds containing ancillary iodide or fluorinated thiolate ligands. Two compounds, (py)₄UF₂I₂·2py and (py)₇Th₂F₅(SC₆F₅)₃·2py were isolated and characterized by conventional methods, powder and low temperature single crystal X-ray diffraction. ...
DOI:
10.1039/c8cc05501g

19. Plutonium chlorido nitrato complexes: ligand competition and computational metrics for assembly and bonding

Author:
Surbella, Robert G.; Ducati, Lucas C.; Autschbach, Jochen; Pellegrini, Kristi L.; McNamara, Bruce K.; Schwantes, Jon M.; Cahill, Christopher L.
Source:
Chemical communications 2018 v.54 no.85 pp. 12014-12017
ISSN:
1364-548X
Subject:
anions; chemical reactions; halogens; hydrogen; ligands; nitrates; plutonium
Abstract:
... Four new [Pu(iv)Clₙ(NO₃)₆₋ₙ]²⁻ (n = 0, 2, 3) and [Pu(vi)O₂Cl₃(NO₃)]²⁻ containing materials were crystallized from acidic, aqueous media and structurally characterized. The anions are assembled via hydrogen and halogen bonding motifs, which are rationalized computationally. The Pu–NO₃ and –Cl bonds were probed using QTAIM and NLMO analyses and found to be polar and largely ionic. ...
DOI:
10.1039/c8cc05578e

20. Polycomb repressive complex 2 binds RNA irrespective of stereochemistry

Author:
Deckard, Charles E.; Sczepanski, Jonathan T.
Source:
Chemical communications 2018 v.54 no.85 pp. 12061-12064
ISSN:
1364-548X
Subject:
RNA; chemical reactions; enantiomers; stereochemistry
Abstract:
... The Polycomb Repressive Complex 2 (PRC2) interacts promiscuously with G-quadruplex (G4) RNA structures. Herein, we tested the limit of this promiscuity by exploring the interaction of PRC2 with G4 RNAs comprised of l-ribonucleic acids (l-RNA), the enantiomer of naturally occurring d-RNA. Remarkably, we find that PRC2 binds similarly to both d- and l-G4 RNAs, suggesting that these interactions are ...
DOI:
10.1039/c8cc07433j