Results 121 to 130 of about 5,444,235 (274)

Toward a Rational Design of Conjugated Copolymers with Oxygenated Side Chains for Boosting Thermoelectric Properties

Advanced Energy Materials, EarlyView.
The molecular design strategy that integrates both side chain and backbone engineering in diketopyrrolopyrrole‐based conjugated polymers to identify the optimal balance between doping efficiency and microstructural order is demonstrated. Comprehensive spectroscopic, electrochemical, morphological, and structural characterizations reveal that the ...
Taewoong Han, Suhui Sim, Hoimin Kim, Taewoong Yoon, Hyungju Ahn, Seungjoo Chang, Namgyu Park, Hajeong Kim, Shabaz Alam, Dongki Lee, Sungjun Park, Sungjoo Lee, Jaewon Lee, Boseok Kang   +13 more
wiley   +1 more source

On Relative Difference Sets in Dihedral Groups

, 2006
In this paper, we study extensions of trivial difference sets in dihedral groups. Such relative difference sets have parameters of the form (uλ,u,uλ, λ) or (uλ+2,u, uλ+1, λ) and are called semiregular or affine type, respectively.
Garciano, Agnes, Hiramine, Yutaka, Yokonuma, Takeo   +2 more
core   +1 more source

Heavy‐Atom Tunneling at Room Temperature Revealed by Instanton Theory

Angewandte Chemie, EarlyView.
Usually, tunneling does not play a significant role in chemical reactions except at low temperature, especially when heavy atoms are involved. However, using nonadiabatic instanton theory we find that heavy‐atom tunneling dominates the reaction mechanism for spin‐forbidden processes in the synthesis of strained organic molecules even at room ...
Debaarjun Mukherjee, Kamil D. Petryczkiewicz, Jeremy O. Richardson   +2 more
wiley   +2 more sources

1-Acetyl-2-r,6-c-bis(4-chlorophenyl)-3-methyl-1,2,5,6-tetrahydropyridin-4-yl acetate

Acta Crystallographica Section E, 2010
In the title compound, C22H21Cl2NO3, the pyridine ring adopts a half-chair conformation and the 4-chlorophenyl groups occupy axial positions. The 4-chlorophenyl groups are almost perpendicular to the plane of the tetrahydropyridine ring forming dihedral ...
V. Vimalraj, K. Pandiarajan
doaj   +1 more source

Rational Backbone Planarization for Doping‐Resilient Polymeric Hole Transport Materials Toward Stable and Scalable Perovskite Solar Cells

Advanced Energy Materials, EarlyView.
Incorporating divinylbenzene into PTAA‐based copolymers induces backbone planarization and promotes polaron delocalization, leading to enhanced doping resilience and stabilized electronic structure. The resulting hole‐transport material, PDVB14, maintains robust performance under high dopant concentrations and prolonged device operation, offering a ...
Chanhyeok Kim, Seung Un Ryu, Du Hyeon Ryu, Hangyeol Kim, Jeongsu Kim, Dohyun Kim, Junwoo Lee, Kyeong‐Jun Jeong, Chang Eun Song, Sung Yun Son, Minjun Kim   +10 more
wiley   +1 more source

A de‐novo Approach Towards Divergent [3+2π/σ] Photocycloadditions of Nitrones via Assembly‐Controlled Kinetic Electron Transfer Gating

Angewandte Chemie, EarlyView.
A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Nayan Saha, Rajesh Kancherla, Jorge Escorihuela, Shana Chandran, Mrinal K. Bera, Magnus Rueping, Burkhard König   +6 more
wiley   +2 more sources

Projective planes and dihedral groups

Discrete Mathematics, 1997
Let \(q\) be a prime power and \(P\) the projective plane of order \(q^2\), \(B_0\), \(B_1\) two disjoint Baer subplanes of \(P\), \(\tau_0\), \(\tau_1\) the corresponding Baer involutions, \(\delta =\tau_0 \tau_1\). The author's main result is the following (a) \(\delta\) is a fixed point free projective collineation whose order \(r\) divides \(q^2- q+
openaire   +3 more sources

A Multistrategy AI‐Assisted Consensus Screening Pipeline for Discovery of Candidate p53 Monomer Binders

Advanced Intelligent Discovery, EarlyView.
An ultra‐fast small‐sample AI consensus pipeline combines co‐folding and docking to target structure‐lacking p53 monomers. Its optimal mini‐protein binder shows robust interfacial affinity and promising druggability, supplying unprecedented antitumor p53 templates.
Ningyao Li, Xueyi Liu, Qiuyue Li, Chengfeng Yue, Xin Li, Yugang Huang, Xin Deng, Junfei Zhang, Xue Liang, Guodong Ye   +9 more
wiley   +1 more source

A Mesoionic Platform for Persistent Anionic Nitrogen‐Centered Radicals

Angewandte Chemie, EarlyView.
Charge did not meet spin: Mesoionic 1,2,3‐triazines undergo reversible one‐electron reduction to persistent anionic nitrogen‐centered radicals. Electron paramagnetic resonance, single‐crystal x‐ray diffraction, and calculations reveal nitrogen‐localized spin and structural reorganization, while crystalline salts show clean redox cycling.
Deepak Ranolia, Aleksandr Koronatov, Yogendra Kumar, Mamta Sham Lal, Boris Tumansky, Alexander Kaushansky, Natalia Fridman, Malachi Noked, Mark Gandelman   +8 more
wiley   +2 more sources

Backbone Steric Constraints Underlie High Passive Membrane Permeability of N‐Alkyl Peptides

Angewandte Chemie, EarlyView.
Beyond amide hydrogen removal, steric constraints encoded in N/Cα‐dually substituted backbones are uncovered as a key determinant of passive membrane permeability in N‐alkyl peptides. These constraints restrict conformational freedom and sterically limit backbone hydration during membrane permeation.
Ayumi Inayoshi, Mariko Akiba, Marin Yokomine, Masatake Sugita, Koji Umezawa, Yuto Hirota, Yutaka Akiyama, Jumpei Morimoto, Shinsuke Sando   +8 more
wiley   +2 more sources