Synthesis, characterization and studies of properties of six polyimides derived from two new aromatic diamines containing a central silicon atom

New Triphenylamine-Based Oligomeric Schiff Bases Containing Tetraphenylsilane Moieties in the Backbone

“…Recently, silicon-containing small molecules and polymers have been investigated as materials for optoelectronics applications, gas separation membranes and the synthesis of porous organic frameworks [ 20 , 21 , 22 , 23 , 24 ]. Silicon-containing polymers, particularly tetra-arylsilane (TPS) derivatives, have become attractive moieties for efficient blue OLEDs as a host material due to their high-energy gap and suitable triplet energy level along with their high quantum efficiency in host/blue-phosphorescent OLEDs [ 25 ].…”

“…Furthermore, polymers with TPS moieties have shown excellent properties for the preparation of materials with wide band-gaps due to the δ-Si structure, which can interrupt the extended π-conjugation achieving high triplet energy materials, high electrochemical, thermal and morphological stability and good film-forming ability [ 26 , 27 , 28 ]. Furthermore, the non-planar tetrahedral TPS geometry in silicon-containing polymers can effectively suppress the intermolecular interactions enhancing the processability by higher solubility for low-cost processing techniques, such as spin-coating and ink-jet printing desirable for large-area applications [ 22 , 27 , 29 , 30 ].…”

“…Nowadays, despite the significant importance of solution-processing TPS-containing polymers for advanced applications, there are few reports in the literature [ 22 , 25 , 30 ]. To the best of our knowledge, there are only two previous reports from silicon-containing polySBs, and both were developed by our research group [ 29 , 31 ].…”

Silylated oligomeric poly(ether-azomethine)s from monomers containing biphenyl moieties: synthesis and characterization

“…8 The -Ar-Si(R 1 R 2 )-Ar-moiety has not only been investigated in the improvement of the processability of polymers. More recently, this unit has been used in the creation of materials for phosphorescent organic light-emitting diodes (PHOLEDs), [9][10][11][12][13] separation and capture of CO 2 gas, 14,15 membrane fabrication for gas separation applications, 16 fabrication of low-cost polymer solar cells 17,18 and synthesis of porous aromatic frameworks. 19 In the case of PAMs, Iwan and Sek 3 have provided an extensive review that considers the applications of these polymers, ranging from the aerospace industry to catalyst carriers, ion complexing agents, and anticorrosion materials as well as in the fabrication of photovoltaic cells and OLEDs.…”

Oligomeric poly(ether‐imide)s bearing ortho trifluoromethyl groups: Solubility, thermal studies, and optical properties

“…Besides, the incorporation of bulky side‐groups in meta or para positions of the benzene rings can inhibit the close packing of the polymer chains, which increases the fractional free volume, improving their processability . Another interesting structural modification that has been explored, particularly by our research group, is the introduction of silicon atoms into the PIs backbones, which increases their dipole moments and the interchain distances …”