Results 51 to 60 of about 25,792 (269)

Twist and Shine: The Impact of Halogen Substitution on Thiele Hydrocarbon's Optical Properties

Angewandte Chemie, EarlyView.
Halogenation in Thiele hydrocarbons strongly influences structure and excited‐state dynamics. Depending on substitution, “boat” folded forms show large Stokes shifts and strong solvatochromism, while planar “butterfly” derivatives exhibit near‐unity photoluminescence yields.
Angela Punzi, Tobias Ullrich, Michele Orza, Davide Mesto, Anna Moliterni, Vincent Olieric, Sylvain Engilberge, Cinzia Giannini, Fabrizia Negri, Dirk M. Guldi, Davide Blasi, Gianluca M. Farinola   +11 more
wiley   +2 more sources

Nonheme Fe Enzyme‐Catalyzed Enantiodivergent Nitrogen Migration: Directed Evolution and Computational Study of Isopenicillin N Synthases for Biocatalytic Synthesis of Arylglycines

Angewandte Chemie, EarlyView.
Nonheme Fe enzyme isopenicillin N synthase was reprogrammed and evolved as an efficient nitrogen migratase IPNSNim, converting diverse azanyl esters to valuable l‐arylglycines with up to 16 000 TTN and 97:3 e.r. IPNSNim and ACCONim allowed enantiodivergent preparation of both l‐ and d‐arylglycines.
Ken Lin, Liu‐Peng Zhao, Shengchun Wang, Huichong Liu, Yu Zhang, Binh Khanh Mai, Peng Liu, Yang Yang   +7 more
wiley   +2 more sources

Halogenation of microcapsule walls [PDF]

, 1972
Procedure for halogenation of confining walls of both gelatin and gelatin-phenolic resin capsules is similar to that used for microencapsulation. Ten percent halogen content renders capsule wall nonburning; any higher content enhances flame-retardant ...
Davis, T. R., Schaab, C. K., Scott, J. C.   +2 more
core   +1 more source

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

Amine and Titanium (IV) Chloride, Boron (III) Chloride or Zirconium (IV) Chloride-Promoted Baylis-Hillman Reactions

Molecules, 2001
The Baylis-Hillman reactions of various aryl aldehydes with methyl vinyl ketone at temperatures below -20oC using Lewis acids such as titanium (IV) chloride, boron (III) chloride or zirconium (IV) chloride in the presence of a catalytic amount of ...
Shi-Cong Cui, Jian-Kang Jiang, Min Shi
doaj   +1 more source

Aerobic Oxidative Dethioacetalization Catalyzed by an Iron Phthalocyanine Complex

Advanced Synthesis &Catalysis, EarlyView.
A protocol for iron octacarboxyphthalocyanine‐catalyzed aerobic oxidative dethioacetalization in an aqueous solvent is developed. This method can efficiently convert a broad range of dithioacetals into the corresponding carbonyl compounds. Inspired by enzyme‐mediated redox processes, the environmentally friendly catalytic system exhibits remarkable ...
Hirofumi Ueda, Ryo Sato, Hayato Machii, Nagao Kobayashi, Hidetoshi Tokuyama   +4 more
wiley   +1 more source

Site-selective chlorination of pyrrolic heterocycles by flavin dependent enzyme PrnC

Communications Chemistry
Halogenation of pyrrole requires strong electrophilic reagents and often leads to undesired polyhalogenated products. Biocatalytic halogenation is a highly attractive approach given its chemoselectivity and benign reaction conditions.
GuangRong Peh, Terence Tay, Lee Ling Tan, Elaine Tiong, Jiawu Bi, Yi Ling Goh, Suming Ye, Fu Lin, Cheryl Jia Xin Tan, Yong Zi Tan, Joel Wong, Huimin Zhao, Fong Tian Wong, Ee Lui Ang, Yee Hwee Lim   +14 more
doaj   +1 more source

Design and synthesis of aromatic molecules for probing electric-fields at the nanoscale [PDF]

, 2015
We propose using halogenated organic dyes as nanoprobes for electric field and show their greatly enhanced Stark coefficients using density functional theory (DFT) calculations.
Buda, Francesco, Faez, Sanli, Gourdon, André, Markoulides, Marios, Orrit, Michel, Verhart, Nico R.   +5 more
core   +5 more sources

Substituent‐Based Modulation of Self‐Assembly and Immunogenicity of Amphipathic Peptides

Advanced Science, EarlyView.
This study systematically investigates how positional and subtle changes, such as substituents on the phenyl ring attached to short amphipathic peptides, influence their self‐assembly, fibril morphology, and immunogenic responses. ABSTRACT Self‐assembled peptide‐based biomaterials provide versatile platforms for biomedical uses, featuring customizable ...
Anirban Das, Ushasi Pramanik, Elise M. Brown, Chih‐Yun Liu, Huan Gong, Jonathan Fascetti, Mark Gibson, Samuel Stealey, Silviya P. Zustiak, Cory Berkland, Piyoosh Sharma, Meredith E. Jackrel, Mark A. White, Jai S. Rudra   +13 more
wiley   +1 more source

Enzymatic Bromocyclization of α‐ and γ‐Allenols by Chloroperoxidase from Curvularia inaequalis

ChemistryOpen, 2022
Vanadate‐dependent chloroperoxidase from Curvularia inaequalis catalyzes 5‐endo‐trig bromocyclizations of α‐allenols to produce valuable halofunctionalized furans as versatile synthetic building blocks. In contrast to other haloperoxidases, also the more
Janne M. Naapuri, Philip K. Wagner, Prof. Dr. Frank Hollmann, Prof. Dr. Jan Deska   +3 more
doaj   +1 more source