Fluorescent gel from a self-assembling new chromophoric moiety containing azobenzene based tetraamide.
A new chromophoric low molecular weight (LMW) organic molecule, 1, was synthesized, and it forms gels in various organic solvents including toluene, o-xylene, m-xylene and p-xylene. The resultant gel phase materials exhibit enhanced and red-shifted fluorescence emission in the respective gelling solvents. This gelator molecule is self-assembled using various noncovalent interactions including hydrogen bonding, pi-pi staking and van der Waals interactions to get the gel phase materials. The molecule 1 is very weakly fluorescent in solution, but its intensity is increased by almost 40 times in their respective gelled state depending on the nature of the gelling solvents. Self-assembly of this molecule in the above-mentioned organic solvents gives an elongated nanofibrillar network that can be visualized through Field Emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM).
Palui
Goutam
G
Chemistry Division, Indian Institute of Chemical Biology, Kolkata, India.
Banerjee
Arindam
A
D000577:Amides / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000494:pharmacology*; D005782:Gels; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018625:Microscopy, Atomic Force / Q000379:methods; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D012997:Solvents; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014961:X-Ray Diffraction; D014992:Xylenes
D000577:Amides; D001391:Azo Compounds; D005456:Fluorescent Dyes; D005782:Gels; D012997:Solvents; D014992:Xylenes; C009850:azobenzene