Novel materials based on self-assembly of organophosphonic acids1This article was presented at the Second Contemporary Inorganic Conference (CIC-II) held at Texas A&M University, College Station, TX, USA, on March 12-15, 2000.1 Conference Paper uri icon

abstract

  • We have identified two distinct types of molecular building blocks based on organophosphonic acids for the design of polymeric crown ether assemblies and three-dimensional open structures. The phosphorylated crown ethers, N-(phosphonomethyl)-aza-18-crown-6 (1H2N) and N-(phosphonomethyl)-aza-15-crown-5 (2H2N) form one-dimensional polymeric arrays like 'leaflets' through hydrogen bonded and coordination bonded self-assembly. Nitrilotri(methylphosphonic acid) (3H6N) forms unique three-dimensional hexagonal structures when reacted with amines, 1,7-phenanthroline, 1,10-phenanthroline, acridine and tripropylamine in 1:1 molar ratio. Monodeprotonation of 3H6N in these complexes triggers a prototypal self-complementary 3D hexagonal architecture. The structural features of 1:1 and 1:1.5 complexes of acid 3H6N with acridine reveal the importance of template effects in stabilizing the three-dimensionally hydrogen bonded open structures. © 2001 Elsevier Science Ltd. All rights reserved.

author list (cited authors)

  • Sharma, C., Hessheimer, A. J., & Clearfield, A.

citation count

  • 33

publication date

  • July 2001