281-54-9Relevant academic research and scientific papers
Synthesis and conformation of unsubstituted calix[4]arene
McMurry,Phelan
, p. 5655 - 5658 (1991)
The title compound was prepared and its structure was investigated by single-crystal X-ray diffractometry. The conformation of the molecule in the crystalline state was found to be different from those conformations formerly reported for substituted calix[4]arenes. Molecular mechanics calculations indicate that the conformation in the crystal does not represent an energy minimum.
Antithrombotic treatment with calix(n)arene compounds
-
, (2008/06/13)
A method of inhibiting thrombus formation in a mammalian subject. The method involves administering to the subject a therapeutically effective dose of a calix(n)arene compound derivatized, at its ring positions meta to the bridge attachments to the ring, with polar substituents having terminal sulfonate groups, including esters and amides which are cleavable in vivo.
Non-linear optical waveguiding material comprising a dopant having multiple donor-pi-acceptor systems
-
, (2008/06/13)
The invention relates to an optically non-linear active waveguiding material comprising an optically transparent polymer and a non-linear optical dopant comprising more than one donor-?-acceptor unit. Dopants comprising more than one donor-?-acceptor unit, especially dopants in which the donor-?-acceptor units are positioned in a cyclic group, have a high hyperpolarisability and a charge-transfer absorption band wavelength which is about the same as that of dopants with only one donor-?-acceptor unit. Especially suitable dopants for use are calix(4)arenes. These are provided with acceptor groups at the upper rim and with donor groups at the lower rim. In addition to having excellent hyperpolarisability, these compounds were found to be readily soluble in host polymers, such as PMMA and polystyrene. Because of their charge-transfer absorption band at a low wavelength, optically non-linear active waveguiding structures containing such dopants are suitable for use as frequency doublers. The invention further relates to hitherto undisclosed calix(4)arenes functionalised with nitrostilbene groups, cyanostilbene groups, sulphonyl stilbene groups, sulphonate stilbene groups, azobenzenes or benzylidene aniline compounds.
Polymer bound calixarenes
-
, (2008/06/13)
A linear or cross-linked polymer selected from polythioethers, polyethers, styrenic polymers, polyacrylates, and polyorganosiloxanes having a plurality of calixarene groups bound thereon, the calixarene groups having the formula STR1 where the R1 groups are the same or different H or hydrocarbyl groups; the R2 groups are H, hydrocarbyl, --CH2 C(=O)OR3, --CH2 C(=O)R3, or --C(=O)NHR3, R3 is hydrocarbyl or substituted hydrocarbyl; n is an integer of 1-8, m is an integer of 0-7 and n+m is 4-8.
