Results 121 to 130 of about 36,937 (221)

More π, less Gap: Band Gap Tuning in Hybrid Antimony Halide Charge Transfer Semiconductors

Zeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 11, 16 July 2026.
Extending the π‐conjugation of the organic cation from bipyridinium to phenanthrolinium in hybrid antimony chloride charge transfer semiconductors reduces the band gap from 2.6 to 2.1 eV. This demonstrates that modifying the organic cation's π‐system enables band gap tuning in hybrid charge transfer semiconductors.
Jakob Blahusch, Mirjam Zipkat, Wolfgang Schnick, Bettina V. Lotsch   +3 more
wiley   +1 more source

Exploring Polyene Construction Tactics for the Total Synthesis of Ocular Pyridinium Bisretinoids of Lipofuscin A2E and pdA2E. [PDF]

J Org Chem
Vidal B, Martínez C, Álvarez R, de Lera ÁR.   +3 more
europepmc   +1 more source

Designer Aromatic Cations for Photoinduced Protein Ligation, Imaging, and Intracellular Labeling at Extended Wavelengths. [PDF]

J Am Chem Soc
Saha PC, Solanke PR, Biswas S, Agarwal V, Taylor MT.   +4 more
europepmc   +1 more source

Sterisch überfrachtete Alken‐Photo‐Redox‐Schalter auf Basis von Chinolinium/Carben Bausteinen

Angewandte Chemie, Volume 138, Issue 29, 13 July 2026.
Eine modulare Synthese einer neuen Klasse von Photo‐ und Redox‐Schaltern wird beschrieben, die auf der Kombination von Chinoliniumsalzen und Carbenen basiert. Das photochemische Schalten ermöglicht einen selektiven Wechsel zwischen gefalteten E/Z‐Isomeren, während das elektrochemische Schalten den Wechsel zwischen neutralen, radikalkationischen und ...
Chris Burdenski, Patrick W. Antoni, Marcel E. Baumert, Leonie Ziemann, Samaresh C. Sau, Julian J. Holstein, Maria Castro, Nitin Kumar, Ofer Filiba, Igor Schapiro, Max M. Hansmann   +10 more
wiley   +1 more source

Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries

Angewandte Chemie, Volume 138, Issue 28, 6 July 2026.
This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho, Al Vicente Riano D. Lisboa, Juntao Sun, Taeho Kang, Keary M. Engle   +4 more
wiley   +2 more sources

Quaternary Carbons from Amines and Acids. [PDF]

J Am Chem Soc
Zhao R, Wang S, Shi P, Das SK, Meng S, Lei A, Cernak T.   +6 more
europepmc   +1 more source

Potassium Bisulfite's Role in Developing a Robust Platform for Enantioenriched <i>N</i>-Alkylpyridinium Salts as Piperidine Precursors. [PDF]

J Am Chem Soc
Selingo JD, King JR, Pio B, Neel AJ, Lam YH, Paton RS, Maddess ML, McNally A.   +7 more
europepmc   +1 more source

Deprotonation- and TICT-triggered ultra-large Stokes shift of aqueous NIR-emissive hydroxylstryryl-pyridinium derivatives. [PDF]

RSC Adv
Lu X, Xiong L, Zhang Z, Yang H, Li E, Zhang H.   +5 more
europepmc   +1 more source

A Three-Step Route to Functionalized Pyrrole-2,5-Dicarboxylic Acids from Galactaric Acid. [PDF]

ChemSusChem
Trapasso G, Dalla Torre D, Artuso M, Aricò F.   +3 more
europepmc   +1 more source

Overcrowded Alkene Photo‐Redox‐Switches Based on Quinolinium/Carbene Building Blocks

Angewandte Chemie International Edition, Volume 65, Issue 29, 13 July 2026.
A modular synthesis of a new class of photo‐ and redox‐switches is described based on the combination of quinolinium salts and carbenes. Photochemical switching allows to selectively switch between folded E/Z isomers, while electrochemical switching allows to change between neutral, radical cation and dicationic oxidation states, which are all isolable
Chris Burdenski, Patrick W. Antoni, Marcel E. Baumert, Leonie Ziemann, Samaresh C. Sau, Julian J. Holstein, Maria Castro, Nitin Kumar, Ofer Filiba, Igor Schapiro, Max M. Hansmann   +10 more
wiley   +1 more source