𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis of novel porphyrin-based biscalix[4]arenes

✍ Scribed by Miroslav Dudicˇ; Pavel Lhota´k; Vladimi´r Kra´l; Kamil Lang; Ivan Stibor

Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
250 KB
Volume
40
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

A novel method for the preparation of porphyrin-based biscalix[4]arenes has been developed, starting from appropriate aryldipyrrolylmethane and calix[4]arene monoaldehyde. The condev~tion reaction in the presence of BF3"Et20 leads to the title compounds in good yields (30-54%). Novel derivatives represent the first example of porphyrin-based calix[4]areaes with directly connected aromatic subsystems of both moieties. The photophysical properties of biscalix[4]arenes are presented.

📜 SIMILAR VOLUMES

Synthesis of biscalix[4]arene with enhan
Synthesis of biscalix[4]arene with enhanced binding ability to a cationic guest
✍ Koji Araki; Tomokazu Watanabe; Monoru Oda; Hiromi Hayashida; Mikio Yasutake; Ter 📂 Article 📅 2001 🏛 Elsevier Science 🌐 French ⚖ 91 KB

The biscalix[4]arene showed remarkably enhanced inclusion ability for the N-methylpyridinium ion due to the increasing p-basicity of the benzene rings, which interact with the guest in an edge-to-face manner, in calix[4]arene skeletons.

A biscalix[4]arene-based ditopic hard/so
A biscalix[4]arene-based ditopic hard/soft receptor for K+/Ag+ complexation
✍ Jan Budka; Pavel Lhoták; Ivan Stibor; Veronika Michlová; Jan Sykora; Ivana Cisar 📂 Article 📅 2002 🏛 Elsevier Science 🌐 French ⚖ 327 KB

A biscalixarene bearing tert-butylated and de-tert-butylated calix[4]arene unit connected by four ethylenoxy bridges has been prepared. This compound adopts the pinched cone conformation (C 2v symmetry) and hence, is suitably preorganised for Ag + complexation. X-ray crystallography showed that the

Synthesis and Characterization of a Nove
Synthesis and Characterization of a Novel Calix[4]arene-Based Periodic Mesoporous Organosilica
✍ Chunqing Liu; Lei Fu; James Economy 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 185 KB

## Abstract **Summary:** A new calix[4]arene‐based periodic mesoporous organosilica has been synthesized using tetraethoxysilane (TEOS) and a calix[4]arene‐based silane monomer as the precursors and cetyltrimethylammonium bromide (CTAB) surfactant as the structure‐directing template, and is shown t