New Mesomorphic Compounds: N,N′,N″-Trialkanoyl-2,4,6-trimethyl-1,3,5-benzenetriamines

Abstract

The homologous series of N,N′,N″-trialkanoyl-2,4,6-trimethyl-1,3,5-benzenetriamines has been prepared. The viscous birefringent melts are given by the butyryl to hexadecanoyl derivatives. The X-ray diffraction pattern recorded for the octanoyl derivative and the higher homologous members consists of two sharp inner peaks and a broad outer one assignable to the 100, 110, and 001 reflections respectively, indicating that the phase is hexagonal disordered columnar (Dhd). A more-structured high-temperature phase is displayed at lower temperatures by the nonanoyl to hexadecanoyl derivatives.

A New Class of Ultra‐Efficient Supramolecular Nucleating Agents for Isotactic Polypropylene

“…Compared with the clearing temperatures reported by Harada and Matsunaga [ 19 ] for compounds with linear n -alkyl chains from n = 5 to 15, the compounds presented here feature much higher melting or sublimation temperatures and do not exhibit liquid crystalline mesophases. again 3.0 g neat i -PP was added resulting in a mixture containing 0.032 wt% additive.…”

Mesomorphic properties of short chains substituted heteroaromatic salts

“…Up to now, when series of homologous discotic compounds could be synthetized, the columnar mesophases have generally been obtained for aliphatic chains at least as long as 4 or 5 methylene groups [1]. A few exceptions to this rule have appeared in the literature [2][3][4][5]. However, the natures and the organizations of these phases have not always been fully elucidated.…”

“…Mesomorphic properties of short chains substituted heteroaromatic salts M. Veber (1,2), P. Sotta (1), P. Davidson (1), A. M. Levelut (1), C. Jallabert (2) and H. Strzelecka (2) (1) Laboratoire de Physique des Solides (*), Bât. 510, Université Paris Sud, 91405 Orsay, France (2) ESPCI (**), 10 rue Vauquelin, 75231 Paris Cedex 05, France (Reçu le 16 janvier 1990, révisé le 28 février 1990, accepté le 7 mars 1990) Résumé.…”

Melt Electrospinning of Small Molecules

“…Its benzene core additionally features a triple methyl substitution (ESI, Table S2). The core substitution influences the supramolecular packing, resulting in higher transition temperatures . Here, n ‐octyl substituents were chosen to lower the transition temperatures instead of n ‐hexyl ones.…”

“…1,3,5‐Benzenetrisamides ( 1 (S) to 6 (S)), and 1,3,5‐cyclohexanetrisamides ( 11 – 14 ) were synthesized according to the literature procedures . All other as yet unreported trisamides presented in this article were synthesized according to known literature methods . Full synthetic procedures and analytical data are included in the ESI.…”