Font Size: a A A

Syntheses And Properties Of Calix[4]arenes Derivatives

Posted on:2009-11-17Degree:MasterType:Thesis
Country:ChinaCandidate:L Y WuFull Text:PDF
GTID:2121360245458184Subject:Analytical Chemistry
Abstract/Summary:PDF Full Text Request
In this dissertation, we reviewed the progess of calixarene chemistry in their structure, functional modification and the application on molecular recognition. And some calix[4]arene derivatives were synthesized according to our design. Their properties were also studied:1. 5-Mono[(4-methylphenyl)azo]-25, 26, 27, 28-tetrahydroxycalix[4]arene has been synthesized and its crystal structure was determined by X-ray diffraction analysis. It crystallizes in a triclinic space group P-1, withα= 10.9773(9), b = 18.4860(15), c = 18.8587(16) (?),α= 60.820(2),β= 77.198(2),γ= 89.198(2)°, V = 3238.3(5)(?)3, Z = 4, Dc = 1.187 mg/m3,μ= 0.081mm-1, F(000) = 1224, the final R = 0.0927 and wR = 0.1577 for 13941 observed reflections with I > 2σ(I). Crystal structure indicated that the calix[4]arene derivative exists in a distorted-cone conformation with intramolecular hydrogen bonds.2. Two 26, 28-di(p-nitroazobenzeneoxylethyl )calix[4]arene crown derivatives with cone 5a and partial cone conformation 5b were synthesized. The maximum absorption of 5a is at 367nm in the UV-Vis spectrum and the distribution of products 5a and 5b was compared under two different reaction conditions.3. Two bolaamphiphiles based on calix[4]arene 9a and 9b were synthesized. The properties of two calix[4]arene ionic salt derivatives 9a and 9b have been measured by theπ-A curve, the compress and outspread isotherm. The results show that molecular areas of compound 9a and 9b are 105(?)2 and 120(?)2, respectively. Both of their monolayer is stable in the interface air and water.
Keywords/Search Tags:Calix[4]arene, Crystal structure, Azo functional groups, LB films, Bolaamphiphile
PDF Full Text Request
Related items