Hydrogen-bonded supramolecular polymers

In view of the reversible and dynamic nature of noncovalent interactions, supramolecular polymers have attracted much attention in recent years as they not only possess conventional polymeric properties, but also show new distinct material properties, which ensure their potential application in a broad range of fields [1-5]. The secondary interactions involved in the construction of the supramolecular stmctures include hydrogen bonding, metal-ligand coordination, n-n stacking, ionic interaction, and host-guest interaction etc. Each of these noncovalent interactions 

School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, China e-mail l) wang nju.edu.cn 

Li and L. Wu (eds.). Hydrogen Bonded Supramolecular Structures, Lecture Notes in Chemistry 87, DOI 10.1007/978-3-662-45756-6 10 

During the last two decades, there have been several reports of hydrogenbonding motifs capable of forming exceptionally robust dimers to achieve hydrogen-bonded supramolecular polymers. Inspired by DNA base pairs, almost aU of the artificial, multiple hydrogen-bonding motifs are developed from heterocycles. 

In this part, we will initially introduce several typical multiple hydrogen-bonding motifs which have been studied most often in the construction of hydrogen-bonded supramolecular polymers. 

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Lange RFM, van Gurp M, Meijer EW. Hydrogen-bonded supramolecular polymer networks. J Polym Sci Part A Polym Chem 1999 37 3657-3670. 

Armstrong G, Buggy M. Hydrogen-bonded supramolecular polymers a Uterature review. J Mater Sci 2005 40 547-559. 

Shimizu LS. Perspectives on main-chain hydrogen bonded supramolecular polymers. Polym... 

Fig.1 Architectures of different hydrogen bonded, supramolecular polymers (A hydrogen-bonding acceptor D = hydrogen-bonding donor)...

An approach towards fibers made from the hydrogen-bonded supramolecular polymer has been reported [213]. Two PS-b-P4VP diblock copolymers... 

Corhin PS, Zimmermann SC (2005) Hydrogen bonded supramolecular polymers linear and network polymers and self-assembhng discotic polymers. CRC press, Boca Raton, El, p 153... 

A columnar mesophase has been used by the group of Percec for the creation of hydrogen-bonded supramolecular polymers.60-61 The phase separation of the apolar side groups of substituted benzamides with the core of the molecule accounts for the self-assembly into a cylindrical structure in which hydrogen bonding acting along the columnar axis occurs and stabilizes the column. 

The ready availability of bis-isocyanates makes dimers of modules 71 and 75 straightforward to synthesize. Meijer and co-workers have pioneered this approach [49] to create hydrogen-bonded, supramolecular polymers of considerable size and molecular weight (see Sect. 4). A different dimeric... 

Doubly hydrogen-bonded supramolecular polymers 35 and 36 consisting of carboxylic acid and diaminopyridine moieties exhibit monotropic liquid-crystalline behavior [63a, 83]. A texture of dendritic growth characteristic of columnar phases is seen for the complex [63a]. 

Fig. 1.14 Chemical structures of monomer chromophore 46 (donor) and 47 (acceptor) and graphical representation for preparation of water-dispersible light-harvesting nanospheres of hydrogen bonded supramolecular polymers. Adapted from Ref. [113] by permission of The Royal Society of Chemistry...

Li SL, Xiao T, Xia W, et al. New hght on the ring—chain equilibrium of a hydrogen-bonded supramolecular polymer based on a photochromic dithienylethene unit and its energy-transfer properties as a storage material. Chem EurJ. 2011 17 10716-10723. 

Xiao T, Feng X, Ye S, et al. Highly controllable ring—chain equilibrium in quadruply hydrogen bonded supramolecular polymers. Macromolecules. 2012 45 9585-9594. 

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