Results 51 to 60 of about 1,415,920 (286)

Effect of molecular and electronic structure on the light harvesting properties of dye sensitizers [PDF]

open access: yes, 2007
The systematic trends in structural and electronic properties of perylene diimide (PDI) derived dye molecules have been investigated by DFT calculations based on projector augmented wave (PAW) method including gradient corrected exchange-correlation ...
Acebal P.   +51 more
core   +3 more sources

“Anti‐Electrostatic” Halogen Bonding

open access: yesAngewandte Chemie, 2020
Halogen bonding is often described as being driven predominantly by electrostatics, and thus adducts between anionic halogen bond (XB) donors (halogen‐based Lewis acids) and anions seem counterintuitive.
Jana M. Holthoff   +3 more
semanticscholar   +1 more source

5-Iodo-1-Arylpyrazoles as Potential Benchmarks for Investigating the Tuning of the Halogen Bonding

open access: yesCrystals, 2020
5-Iodo-1-arylpyrazoles are interesting templates for investigating the halogen bond propensity in small molecules other than the already well-known halogenated molecules such as tetrafluorodiiodobenzene.
Denisa Dumitrescu   +5 more
doaj   +1 more source

Characterising Supramolecular Architectures in Crystals Featuring I⋯Br Halogen Bonding: Persistence of X⋯X’ Secondary-Bonding in Their Congeners

open access: yesCrystals, 2021
The Cambridge Structural Database was surveyed for crystals featuring I⋯Br secondary-bonding in their supramolecular assemblies occurring independently of other obvious supramolecular synthons and devoid of other halogen bonding interactions.
Edward R. T. Tiekink
doaj   +1 more source

Coordination networks incorporating halogen-bond donor sites and azobenzene groups [PDF]

open access: yes, 2016
Two Zn coordination networks, [Zn(1)(Py)2]2(2-propanol)n (3) and [Zn(1)2(Bipy)2](DMF)2n (4), incorporating halogen-bond (XB) donor sites and azobenzene groups have been synthesized and fully characterized.
Fernandez-Palacio F.   +6 more
core   +1 more source

Halogen, Chalcogen, Pnictogen, and Tetrel Bonding in Non-Covalent Organocatalysis: An Update.

open access: yesAngewandte Chemie
The use of noncovalent interactions based on electrophilic halogen, chalcogen, pnictogen, or tetrel centers in organocatalysis has gained noticeable attention.
Dragana Radic Jovanovic   +2 more
semanticscholar   +1 more source

Employing Halogen Bonding Interactions in Chemiresistive Gas Sensors [PDF]

open access: yes, 2015
This paper reports the use of halogen bonding interactions for gas-phase detection of pyridine in SWCNT-based chemiresistive sensors with sub-ppm theoretical detection limits.
Mirica, Katherine   +3 more
core   +2 more sources

Halogen Bonds Fabricate 2D Molecular Self-Assembled Nanostructures by Scanning Tunneling Microscopy

open access: yesCrystals, 2020
Halogen bonds are currently new noncovalent interactions due to their moderate strength and high directionality, which are widely investigated in crystal engineering.
Yi Wang, Xinrui Miao, Wenli Deng
doaj   +1 more source

Application of Halogen Bonding to Organocatalysis: A Theoretical Perspective

open access: yesMolecules, 2020
The strong, specific, and directional halogen bond (XB) is an ideal supramolecular synthon in crystal engineering, as well as rational catalyst and drug design.
Hui Yang, M. W. Wong
semanticscholar   +1 more source

Photoinduced Atom Transfer Radical Addition/Cyclization Reaction between Alkynes or Alkenes with Unsaturated α-Halogenated Carbonyls

open access: yesMolecules, 2021
We have developed a photochemical ATRA/ATRC reaction that is mediated by halogen bonding interactions. This reaction is caused by the reaction of malonic acid ester derivatives containing bromine or iodine with unsaturated compounds such as alkenes and ...
Kazuki Matsuo   +3 more
doaj   +1 more source

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