Single-crystal-to-single-crystal guest exchange in columnar assembled brominated triphenylamine bis-urea macrocycles

Abstract

Crystals of brominated triphenylamine bis-urea macrocycles are robust materials which can undergo single-crystal-to-single-crystal guest exchange inside 1-dimensional columns.

Direct Crystallization of Diamine Radical Cations: Carbon‐Nitrogen Bond Formation from the Reaction of Triphenylamine with TiCl4, TiBr4, or SnCl4 versus Carbon‐Carbon Bond Formation with SbCl5**

“…The importance of amines in chemistry and material science usually stems from their electron‐donating properties and basicity. In contrast, non‐basic triphenylamines and related compounds are involved in the construction of a range of materials that are useful for electrooptical devices, organic light emitting diodes, conductive materials, organic batteries and porous materials [1–9] …”

Modular Synthesis of Tetraurea and Octaurea Macrocycles Encoded with Specific Monomer Sequences

“…The synthesis of macrocycles is a fundamental challenge because of their entropically disfavored nature and competition from side reactions (oligomerization and polymerization) during the ring-closure processes. 1 Through elegant molecular designs and synthetic methodologies, 2,3 various macrocyclic structures have been made and engineered with specific monomer sequences for the uses of molecular recognition, [4][5][6] chemical storage and separation, 7,8 catalysis, [9][10][11] molecular machines, 12 assemblies, [13][14][15][16] and adaptive materials. [17][18][19] Benefitting from the characteristic hydrogen bonding nature (high-rigidity and self-complementarity) of the urea unit, 20,21 urea-based macrocycles have attracted great attention in the studies of anion recognition [22][23][24][25][26] and hierarchical assembly.…”

Steering polymer growth by molding nanochannels: 1,5-hexadiene polymerization in high silica mordenite

“…[4,[16][17][18][19][20][21][22][23][24] The geometrical constraints of the zeolitic framework can be proficiently exploited to induce the formation of nanostructured arrays with the desired dimensionality. Supramolecular materials which do not require chemical reactions to form compositessuch as dye-zeolite composites/artificial antenna systems in zeolite channels, [25][26][27][28][29][30][31][32][33] biomolecules and chromophores immobilized in 1-D channels, [34][35][36][37][38][39][40][41] or low-dimensional nanoarchitectures of molecular clusters [42][43][44] -have been successfully realized. The preparation of a continuous organic nanowire via a chemical reaction, i.e.…”