Results 131 to 140 of about 56,095 (275)
Angewandte Chemie, EarlyView.We disclose a novel boron macrocycle derived from the sustainable furan building block. The boraporphyrinoid exhibits a global antiaromatic ring current and dynamic conformational flexibility. Twofold reduction induces a switch to strong global aromaticity, accompanied by stiffening of the porphyrinoid backbone.
Lukas Swoboda +6 more
wiley +2 more sources
Structure-activity correlations for organophosphorus ester anticholinesterases. Part 2: CNDO/2 calculations applied to ester hydrolysis rates [PDF]
Quantitative structure-activity relationships are presented for the hydrolysis of organophosphorus esters, RR'P(O)X, where R and R' are alkyl and/or alkoxy groups and X is fluorine, chlorine or a phenoxy group.
Golub, M. A. +3 more
core +1 more source
Angewandte Chemie, EarlyView.Covalently linked carbazole dimers exhibit intense excimer‐based circularly polarized luminescence (CPL). A simple propylene‐tethered dimer achieves glum ≈ 0.01 in the violet region—among the highest for small organic emitters without heavy atoms. Conformational mapping reveals CPL is governed by thermodynamic/kinetic control of emissive conformers ...
Tomohiro Kujime, Zhe Wang, Tadashi Mori
wiley +2 more sources
Photo-heterolysis and -homolysis of substituted diphenylmethyl halides, acetates, and phenyl ethers in acetonitrile: characterization of diphenylmethyl cations and radicals generated by 248-nm laser flash photolysis [PDF]
, 1990 Bartl, Joerg +3 more
core +1 more source
Acid Dissociation Constants of Sulfanilamides and Substituent Effect on the Constant
YAKUGAKU ZASSHI, 1964 M, YOSHIOKA, K, HAMAMOTO, T, KUBOTA
openaire +3 more sources
Angewandte Chemie, EarlyView.Superchaotropic binding of Keggin polyoxometalates (POMs) to non‐ionic biopolymers like cellulose ethers (CEs) stabilizes otherwise hydrolytically unstable POMs in aqueous solution and allows conversion of pH‐nonresponsive polymers into pH‐responsive soft materials. The pH‐driven conversion from plenary to lacunary POMs switches superchaotropic binding
Vighnesh B. Lokare +3 more
wiley +2 more sources
Angewandte Chemie, EarlyView.This work details the rapid generation (t ≤ 5 min) of size‐tunable, ultralow dispersity (Ð ≤ 1.01) 2D hexagonal nanosheets by self‐limiting polymerization‐induced crystallization‐driven self‐assembly (SL‐PI‐CDSA) of modular and templating poly(aryl isocyanide) block copolymers, with functions that permit post‐polymerization modifications. Specifically,
Randall A. Scanga +13 more
wiley +2 more sources
An Artificial Molecular Pump Powered by Light
Angewandte Chemie, EarlyView.A minimal rotaxane‐based supramolecular system functions as a light‐powered molecular pump, capturing macrocycles from solution and concentrating them within an intramolecular compartment. Repeated azobenzene photoisomerization modulates the binding and kinetic barriers of threading and shuttling, generating a photon‐driven energy ratchet that sustains
Federico Nicoli +7 more
wiley +2 more sources
Homoleptic and Heteroleptic Borylones L1‐B(Ph)‐L2
Angewandte Chemie, EarlyView.Density functional theory and CCSD(T) calculations reveal that homoleptic and heteroleptic borylones L1–B(Ph)–L2 are thermodynamically accessible. Remarkably, the homoleptic borylones B(Ph)(N2)2 and B(Ph)(SPh2)2 exhibit higher bond dissociation energies than the related carbones.
Qin Ma +4 more
wiley +2 more sources