Journal of the American Chemical Society
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#1Yawei Liu (Emory University)H-Index: 5
#2David A. Cullen (ORNL: Oak Ridge National Laboratory)H-Index: 51
Last. Tianquan Lian (Emory University)H-Index: 75
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Solar-to-fuel conversion reaction often requires multiple proton-coupled electron transfer (PCET) processes powered by the energetic electrons and/or holes generated by the absorption of multiple photons. The effective coupling of multiple electron transfer from the light absorber with the multiple PCET reactions at the catalytic center is one of the key challenges in efficient and selective conversion of solar energy to chemical fuels. In this paper, we examine the dynamics of multiple electron...
#1Christian Fiankor (UNL : University of Nebraska–Lincoln)H-Index: 3
#2James Nyakuchena (Marquette University)H-Index: 3
Last. Jian Zhang (LBNL: Lawrence Berkeley National Laboratory)H-Index: 121
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In the past decades, many attempts have been made to mimic the energy transfer (EnT) in photosynthesis, a key process occurring in nature that is of fundamental significance in solar fuels and sustainable energy. Metal-organic frameworks (MOFs), an emerging class of porous crystalline materials self-assembled from organic linkers and metal or metal cluster nodes, offer an ideal platform for the exploration of directional EnT phenomena. However, placing energy donor and acceptor moieties within t...
#1Xiaolong ZhuH-Index: 6
#2Chunhua HuH-Index: 38
Last. Bart KahrH-Index: 41
view all 11 authors...
#1Tongjin Zhang (CAS: Chinese Academy of Sciences)H-Index: 4
#2Zhonghao Zhou (CAS: Chinese Academy of Sciences)H-Index: 8
Last. Yong Sheng Zhao (CAS: Chinese Academy of Sciences)H-Index: 56
view all 9 authors...
Thermally activated delayed fluorescent (TADF) materials are promising to overcome triplet-induced optical loss in the pursuit of electrically pumped organic lasers. However, population inversion is difficult to establish in these materials due to the severe suppression of triplet-to-singlet upconversion in their condensed states. In this work, we report thermally activated lasing in solution-processed coassembled microcrystals, where TADF dyes were uniformly dispersed into crystalline matrices ...
#1Yu Hai (CAS: Chinese Academy of Sciences)H-Index: 4
#2Hebo Ye (CAS: Chinese Academy of Sciences)H-Index: 8
Last. You Lei (CAS: Chinese Academy of Sciences)
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The manipulation of covalent bonds could be directed toward degradable, recyclable, and sustainable materials. However, there is an intrinsic conflict between properties of stability and degradability. Here we report light-controlled formation/scission of three types of covalent bonds (C-N, C-O, and C-S) through photoswitching between equilibrium and nonequilibrium states of dynamic covalent systems, achieving dual benefits of photoaddressable stability and cleavability. The photocyclization of ...
#1Alexandra Manuela Fernandes Brito (CUNY: City University of New York)
#2Dhwanit Dave (CUNY: City University of New York)
Last. Iva Pashkuleva (University of Minho)H-Index: 25
view all 10 authors...
We report on the supramolecular self-assembly of tripeptides and their O-glycosylated analogues, in which the carbohydrate moiety is coupled to a central serine or threonine flanked by phenylalanine residues. The substitution of serine with threonine introduces differential side-chain interactions, which results in the formation of aggregates with different morphology. O-glycosylation decreases the aggregation propensity because of rebalancing of the π interactions. The glycopeptides form aggreg...
#1Juana M. Pérez (University of Groningen)H-Index: 1
#2Roxana Postolache (University of Groningen)
Last. Syuzanna R. Harutyunyan (University of Groningen)H-Index: 25
view all 9 authors...
Here we report that chiral Mn(I) complexes are capable of H-P bond activation. This activation mode enables a general method for the hydrophosphination of internal and terminal α,β-unsaturated nitriles. Metal-ligand cooperation, a strategy previously not considered for catalytic H-P bond activation, is at the base of the mechanistic action of the Mn(I)-based catalyst. Our computational studies support a stepwise mechanism for the hydrophosphination and provide insight into the origin of the enan...
#1Wenqiang Zhou (CQU: Chongqing University)H-Index: 2
#2Tao Zhou (CQU: Chongqing University)H-Index: 1
Last. Min Zhang (CQU: Chongqing University)H-Index: 7
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The concise, collective, and asymmetric total syntheses of four schizozygane alkaloids, which feature a "Pan lid"-like hexacyclic core scaffold bearing up to six continuous stereocenters, including two quaternary ones, are described. A new method of dearomative cyclization of cyclopropanol onto the indole ring at C2 was developed to build the ABCF ring system of the schizozygane core with a ketone group. Another key skeleton-building reaction, the Heck/carbonylative lactamization cascade, ensure...
#1Zachary C. Hern (UCLA: University of California, Los Angeles)H-Index: 2
#2Stephanie M. Quan (UCLA: University of California, Los Angeles)H-Index: 7
Last. Paula L. Diaconescu (UCLA: University of California, Los Angeles)H-Index: 40
view all 7 authors...
An electrochemically controlled synthesis of multiblock copolymers by alternating the redox states of (salfan)Zr(OtBu)2 (salfan = 1,1'-di(2-tert-butyl-6-N-methylmethylenephenoxy)ferrocene) is reported. Aided by electrochemistry with a glassy carbon working electrode, an in situ potential switch alters the catalyst's oxidation state and its subsequent monomer (l-lactide, β-butyrolactone, or cyclohexene oxide) selectivity in one pot. Various multiblock copolymers were prepared, including an ABAB t...
#1Feng Li (EPFL: École Polytechnique Fédérale de Lausanne)
#2Sophia Thiele (EPFL: École Polytechnique Fédérale de Lausanne)
Last. Harm-Anton Klok (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 69
view all 3 authors...
Surface-initiated polymerization reactions are a powerful tool to generate chain-end-tethered polymer brushes. This report presents a synthetic strategy that gives access to structurally well-defined hydrocarbon polymer brushes of controlled molecular weights, which can be further modified to generate more complex surface-attached polymer architectures. The hydrocarbon brushes reported in this study are polymethylene brushes that are obtained via surface-initiated C1 polyhomologation of dimethyl...
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