Results 81 to 90 of about 12,440 (225)

Efficient, one-pot synthesis of 14-aryl-14Hdibenzo[a, j]xanthenes in aqueous medium catalyzed by bis-piperidinium compounds [PDF]

, 2013
A novel procedure for the synthesis of 14-aryl-14Hdibenzo[a,j]xanthenes through one-pot condensation of b-naphthol with aryl halides in aqueous media catalyzed by bis-piperidinium compounds is described. The method resulted in good to excellent yields in
Ahmad, Matloob, Ali Shahid Chatha, Shehzad, Jawwad Saif, Muhammad, Mansha, Asim   +3 more
core  

14-Bromo-12-chloro-2,16-dioxapentacyclohenicosa-3(8),10,12,14-tetraene-7,20-dione [PDF]

, 2013
In the title compound, C19H16BrClO4, both the fused xanthene rings and one of the cyclohexane rings adopt envelope conformations, while the other cyclohexane ring is in a chair conformation. In the crystal, molecules are linked by C-H...O hydrogen bonds,
Abdelhamid, Adel A. E. Marzouk, Alan R. Kennedy, Antar A. Abdelhamid, Cremer, Farrugia, Gobbi, Lu, Mehmet Akkurt, Mohamed, Mohamed, Na, Shaaban K. Mohamed, Sheldrick, Spek   +14 more
core   +1 more source

Temporal fluctuations in excimer-like interactions between pi-conjugated chromophores

, 2015
Inter- or intramolecular coupling processes between chromophores such as excimer formation or H- and J-aggregation are crucial to describing the photophysics of closely packed films of conjugated polymers.
Daniela Schmitz (1356846), Jan Vogelsang (1306854), John M. Lupton (1293213), Klaas Remmerssen (1356840), Philipp Wilhelm (1356849), Sebastian Henzel (1356837), Sigurd Höger (1356843), Stefan-S. Jester (1356831), Thomas Stangl (1356834)   +8 more
core   +2 more sources

A Novel Bis(phosphido)pyridine [PNP]^(2−) Pincer Ligand and Its Potassium and Bis(dimethylamido)zirconium(IV) Complexes [PDF]

, 2010
A novel PNP bis(secondary phosphine)pyridine pincer ligand, 2,6-bis(2-(phenylphosphino)phenyl)pyridine, has been prepared in high yield, and the properties of the doubly deprotonated form as a ligand in K_4(PNP)_2(THF)_6 and (PNP)Zr(NMe_2)_2 have been ...
Bercaw, John E., Winston, Matthew S.
core   +2 more sources

Functional Metal Complexes for Solar–Light‐Driven Energy Conversion

Advanced Materials, Volume 38, Issue 22, 17 April 2026.
This review provides an exhaustive summary of the recent advancements of functional metal complexes in solar‐to‐electrical, ‐chemical, and ‐thermal energy conversion, comprising material categories, design strategies, underlying principles of operation, and identified improvement of performances.
Yanyan Qin, Dou Luo, Miao Zhang, Wai‐Yeung Wong   +3 more
wiley   +1 more source

PMF@SO3H nanosheet: an efficient novel bifunctional acid–base catalyst for the one-pot synthesis of 14-Aryl-14H-Dibenzo[a,j]xanthenes and evaluation of their antimicrobial activities supported by DFT and molecular docking studies

Journal of Saudi Chemical Society
This study presents the design and synthesis of a highly efficient solid acid catalyst based on mesoporous poly(melamine–formaldehyde) (MPMF) functionalized with 1,4-butanesultone.
Zahra Karimi, Leila Amiri-Zirtol, Zahra Nazemoroaya, Najmedin Azizi, Reza Ranjbar-Karimi, Seyedeh Narjes Abootalebi, Ahmad Gholami   +6 more
doaj   +1 more source

Compounds affecting cholesterol absorption [PDF]

, 2004
A class of novel compounds is described for use in affecting lymphatic absorption of cholesterol. Compounds of particular interest are defined by Formula I: ##STR1## or a pharmaceutically acceptable salt ...
Hua, Duy H., Koo, Sung I., Noh, Sang K.
core   +1 more source

A stimuli-responsive double-stranded digold(I) helicate [PDF]

, 2014
We report herein a stimuli-responsive dinuclear double stranded [Au2L2]2+ helicate assembled from gold(I) atoms and phenyl-substituted diphosphine ligands derived from a xanthene-type backbone (L). The conformational flexibility of the dinuclear [Au2L2]2+
Baranyai, Péter, Deák, Andrea Beáta, Hamza, Andrea, Jobbágy, Csaba, Molnár, Miklós, Pálinkás, Gábor   +5 more
core   +1 more source

A Scalable and Resource‐Saving Synthesis of Dipyrromethanes and Tetrapyrroles via Geminal Diethers: Minimal Polymer Formation and Facile Purification

Advanced Synthesis &Catalysis, Volume 368, Issue 7, 1 April 2026.
Geminal dimethoxyethers react with pyrrolic nucleophiles in an efficient and clean reaction under anhydrous, mild conditions, which contrasts with the reactivity of the respective carbonyl compounds. Polymerization is effectively inhibited, providing access to dipyrromethanes, porphyrins, and calix[4]pyrroles that are easily purified.
Janos Wasternack, Clara Schritt, Luca Steiner, Ole Specht, Friedrich Braune, Marius Balizs, Sebastian Müller, Anja Wiesner, Beate Paulus, Siegfried Eigler, Christoph A. Schalley   +10 more
wiley   +1 more source

Enhancing the Fluorescence of an Aggregation‐Induced Emission‐Active Polymorphic System With Remarkable Mechanochromism for Visualizing Microcracks and Stress Distribution in Textiles

Aggregate, Volume 7, Issue 4, April 2026.
A polymorphic AIE system with mechano‐responsive behaviors is developed and exhibits remarkable mechanochromism, force‐induced emission enhancement, and mechanoluminescence properties, with pressure‐induced emission shifts and enhanced fluorescence.
Chunping Ma, Yang Wang, Jiyin He, Qiankun Guo, Baoyu Huang, Wenyang Xie, Zihui Liu, Anqi Xu, Zheng Zhao, Jinpeng Mo, Longfei Fan, Bingjia Xu, Zhenguo Chi, Ben Zhong Tang, Tiangang Luan   +14 more
wiley   +1 more source