title: An AAA-DDD triply hydrogen-bonded complex easily accessible for supramolecular polymers.
abstract: For a complementary hydrogen-bonded complex, when every hydrogen-bond acceptor is on one side and every hydrogen-bond donor is on the other, all secondary interactions are attractive and the complex is highly stable. AAA-DDD (A=acceptor, D=donor) is considered to be the most stable among triply hydrogen-bonded sequences. The easily synthesized and further derivatized AAA-DDD system is very desirable for hydrogen-bonded functional materials. In this case, AAA and DDD, starting from 4-methoxybenzaldehyde, were synthesized with the Hantzsch pyridine synthesis and Friedländer annulation reaction. The association constant determined by fluorescence titration in chloroform at room temperature is 2.09×10(7)  M(-1) . The AAA and DDD components are not coplanar, but form a V shape in the solid state. Supramolecular polymers based on AAA-DDD triply hydrogen bonded have also been developed. This work may make AAA-DDD triply hydrogen-bonded sequences easily accessible for stimuli-responsive materials.
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083 (P.R. China).
authors.forename: Yi-Fei
authors.initials: YF
authors.lastname: Han
authors.forename: Wen-Qiang
authors.initials: WQ
authors.lastname: Chen
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Wang
authors.forename: Ying-Xue
authors.initials: YX
authors.lastname: Yuan
authors.forename: Na-Na
authors.initials: NN
authors.lastname: Wu
authors.forename: Xiang-Zhi
authors.initials: XZ
authors.lastname: Song
authors.forename: Lan
authors.initials: L
authors.lastname: Yang
keywords: donor-acceptor systems; hydrogen bonds; polymers; self-assembly; supramolecular chemistry