Results 1 to 10 of about 726 (155)

Structure Elucidation of In Situ Generated Chiral Hypervalent Iodine Complexes via Vibrational Circular Dichroism (VCD). [PDF]

Angew Chem Int Ed Engl, 2022
AbstractThe structure of in situ generated chiral aryl‐λ3‐iodanes obtained under oxidative reaction conditions was not yet observable with experimental techniques and their proposed structures are purely based on DFT calculations. Herein, we establish vibrational circular dichroism (VCD) spectroscopy as an experimental technique to verify DFT ...
Golub TP, Abazid AH, Nachtsheim BJ, Merten C.   +3 more
europepmc   +3 more sources

Advances of Vibrational Circular Dichroism (VCD) in bioanalytical chemistry. A review. [PDF]

Anal Chim Acta, 2017
Vibrational Circular Dichroism (VCD) is a unique and relatively new spectroscopic technique that is capable of determining an absolute configuration of chiral molecules. VCD can be also used to determine structure of large macromolecules. This review highlights the most recent advances of VCD in bioanalytical chemistry.
Kurouski D.
europepmc   +3 more sources

Vibrational circular dichroism of plasmonic nanostructures embedding chiral drugs [PDF]

Scientific Reports
We investigate the mid-infrared chiroptical response of plasmonic nanostructures based on Al-doped ZnO and layers of an aqueous solution of Ladarixin, a chiral pharmaceutical currently under clinical trial for the treatment of type 1 diabetes. We explore
Raju Adhikary, Matteo Venturi, Giovanna Salvitti, Ambaresh Sahoo, Carino Ferrante, Paola Benassi, Francesco Di Stasio, Andrea Toma, Hatice Altug, Massimiliano Aschi, Andrea Marini   +10 more
doaj   +2 more sources

Chiroptical Spectroscopy, Theoretical Calculations, and Symmetry of a Chiral Transition Metal Complex with Low-Lying Electronic States [PDF]

Molecules
Vibrational circular dichroism (VCD) enhancement by low-lying electronic states (LLESs) is a fascinating phenomenon, but accounting for it theoretically remains a challenge despite significant research efforts over the past 20 years.
Mutasem Alshalalfeh, Yunjie Xu
doaj   +2 more sources

Vibrational Circular Dichroism Spectra of Atomically-Precise Metal Clusters: Unveiling Conformational Structures and Mechanism of VCD Enhancement via Full Models. [PDF]

Small
Abstract While the inherent imprecision of nanoparticles has hindered a thorough comprehension of chirality transfer and enhancement events at the nanoscale, recent advances in ultrastable, chiral metal clusters offer a unique opportunity to tackle this challenge with atomic precision.
Alshalalfeh M, Dong XY, Parshotam S, Li G, Cheeseman JR, Zang SQ, Xu Y.   +6 more
europepmc   +2 more sources

Self-assembled helical superstructures of polystyrene-b-poly(2-vinyl pyridine) with inversed helicity from induced chirality

Giant, 2021
This work aimed to examine the self-assembling behaviors of polystyrene-b-poly(2-vinyl pyridine) (PS-P2VP) complexed with chiral dopants, R-/S-mandelic acid (R-/S-MA).
Che-Chia Yang, Puhup Puneet, I-Ming Lin, Yeo-Wang Chiang, Rong-Ming Ho   +4 more
doaj   +1 more source

A Novel Azaphilone Muyophilone A From the Endophytic Fungus Muyocopron laterale 0307-2

Frontiers in Chemistry, 2021
Two known azaphilone derivatives, 4,6-dimethylcurvulinic acid (1) and austdiol (2), and their novel heterotrimer, muyophilone A (3), were isolated and identified from an endophytic fungus, Muyocopron laterale 0307-2.
Chao Yuan, Yuhua Guo, Ke Wang, Zhunian Wang, Longfei Li, Huajie Zhu, Gang Li   +6 more
doaj   +1 more source

Synthesis and Stereochemical Characterization of a Novel Chiral α-Tetrazole Binaphthylazepine Organocatalyst

Molecules, 2022
A novel α-tetrazole-substituted 1,1′-binaphthylazepine chiral catalyst has been synthesized and its absolute configuration has been determined by DFT computational analysis of the vibrational circular dichroism (VCD) spectrum of its precursor.
Assunta Summa, Patrizia Scafato, Sandra Belviso, Guglielmo Monaco, Riccardo Zanasi, Giovanna Longhi, Sergio Abbate, Stefano Superchi   +7 more
doaj   +1 more source

NIR‐VCD, vibrational circular dichroism in the near‐infrared: Experiments, theory and calculations [PDF]

Chirality, 2009
AbstractThe first well documented experiments of Near Infrared Vibrational Circular Dichroism (NIR‐VCD) were performed around 1975. We review the thirty year history of NIR‐VCD, encompassing both instrumental development and theoretical/computational methods that allow interpretation of experimental spectra, harvesting useful structural information ...
ABBATE, Sergio, CASTIGLIONI, Ettore, GANGEMI, Fabrizio, GANGEMI, Roberto, LONGHI, Giovanna   +4 more
openaire   +3 more sources

Stereochemical Properties of Two Schiff-Base Transition Metal Complexes and Their Ligand by Using Multiple Chiroptical Spectroscopic Tools and DFT Calculations

Molecules, 2023
Two transition metal complexes were synthesized with Ni(II) and Cu(II) using a tetradentate Schiff-base ligand, (R,R) and (S,S)-N,N′-Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine.
Guojie Li, Dan Li, Mutasem Alshalalfeh, Joseph Cheramy, Hui Zhang, Yunjie Xu   +5 more
doaj   +1 more source