Oligobisvelcraplex: self-assembled linear oligomer by solvophobic pi-pistacking interaction of bisvelcrands based on resorcin[4]arene.
[reaction: see text] Bisvelcrand 3 based on resorcin[4]arene was obtained by a stepwise route, and the formation of oligobisvelcraplex 3(n) by solvophobic pi-pistacking interaction was observed. (1)H NMR spectroscopic studies revealed that DeltaG(++)(pseudorotation) of oligobisvelcraplex 3(n) is 16.7 kcal mol(-1) in C(6)D(5)NO(2) solution. The pulsed field gradient spin-echo (PGSE) NMR experiment and VPO experiment showed that the number of aggregation (n) ranges from 7 to 10 in CHCl(3) solution at 298 K. In high concentration, bisvelcrand 3 tends to form gels or fiber.
Ihm
Hyejae
H
CAMDRC and Department of Chemistry, Soongsil University, Seoul 156-743, Korea.
Ahn
Jae-Suk
JS
Lah
Myoung Soo
MS
Ko
Young Ho
YH
Paek
Kyungsoo
K