New cyclotriphosphazene based nanotweezers bearing perylene and glycol units and their non-covalent interactions with single walled carbon nanotubes
摘要:
We report on the design, synthesis and characterization of three new amphiphilic four fragment cyclotriphosphazene nanotweezers based on thermally stable carrier/router cyclotriphosphazene, extended polycyclic aromatic perylene bisimides with hydrophobic aliphatic tail and solvophilic glycol units, suitable for the exfoliation of single-walled carbon nanotubes (SWCHTs). The ultrasonication of SWCNT and new cyclotriphosphazene derivatives provided disentangled and undamaged SWCHTs, which interact with the perylene units through pi-pi interactions. The newly synthesized perylene-cyclotriphosphazenes were characterized by elemental analysis, mass, P-31, H-1 and C-13 NMR techniques. The photophyisical behavior of cyclotriphosphazene derivatives and their nanocomposites were investigated via UV-Vis absorption and fluorescence emission spectroscopy. It was found that non-geminalcis-tris-perylenebisimide substituted compound exhibit an additional fluorescence peak compared with the parent compounds which is consistent with an intramolecular excimer formation. Prepared nanocomposites were also characterized via Raman spectroscopy and the morphological features were analyzed by HR- TEM. The quality of the nanocomposite dispersions in water were evaluated by zeta potential analysis. (C) 2019 Elsevier B.V. All rights reserved.
Synthesis, characterization, and photophysical and fluorescence sensor behaviors of a new water-soluble double-bridged naphthalene diimide appended cyclotriphosphazene
作者:SÜREYYA OĞUZ TÜMAY、SERKAN YEŞİLOT
DOI:10.55730/1300-0527.3613
日期:——
A new water-soluble template of double-bridged naphthalene diimide appended cyclotriphosphazene was prepared, and its photophysical and sensor behaviors were evaluated. The characterization of novel double-bridged naphthalene diimide appended cyclotriphosphazene (6) was carried out by NMR (1H, 13C, 31P) and mass spectroscopies. The photophysicalbehaviors of compound 6 were evaluated by UV-Vis absorption