Phase selective amphiphilic supergelators for oil spill solidification and dye removal

A Novel Chemosensor for Selective Detection of L‐Arginine and L–Cysteine via Macroscopic Sol‐Gel Transition

“…[20][21][22] The reported methods of amino acid recognition in the literature are mainly instrument-based techniques, such as capillary electrophoresis, [23] HPLC, [24] fluorimetry [25,26] and colorimetry, [27,28] but, by contrast, there are only limited reports relying on supramolecular sol-gel transition. [29][30][31][32][33] In continuation of our former studies on azo based supramolecular gelators, [10,34] herein we report the fabrication of an azo based low molecular weight gelator (LMWG), as a rapid visual chemosensor, capable of detecting l-arginine (Arg) and l-cysteine (Cys) in neutral and basic media, respectively. Both Arg and Cys are functional amino acids which play crucial roles in various biological processes including hormone synthesis, [35] detoxifications, [36] embryonic and neonatal growth [37][38][39] as well as their involvement in protein synthesis.…”

Monopeptide-Based Powder Gelators for Instant Phase-Selective Gelation of Aprotic Aromatics and for Toxic Dye Removal

“…Adding into this growing list of recently reported yet limitedly available powder gelators, ,− in this work, we describe our systematic efforts toward the discovery of some powerful powder gelators for instant phase-selective gelation of aprotic aromatics (e.g., benzene, toluene, xylene, and nitrobenzene) at room temperature. These aromatics, which are one important source of environmental pollutions, nevertheless have remained much less studied so far, ,− especially when compared to more widely studied petroleum oils. − Additionally, we have also demonstrated their usefulness in efficiently removing highly concentrated dyes from dye-contaminated water.…”

“…This certainly enables not only near-complete elimination of toxicity caused by either oil or gelator molecules immiscible with water but also possible reclamation of treated oil. This noteworthy advantage both intrinsic and unique to PSOGs has aroused intensive interest from researchers worldwide, resulting in rapid development of diverse types of PSOGs that have now emerged as promising oil-scavenging and dye-removing materials. − …”

How Far Are We in Combating Marine Oil Spills by Using Phase‐Selective Organogelators?

“…Similarly, Hao and co-workers [61] reported the phase-selective gelation of diesel by the gelator 104 when it was introduced as a solution in toluene to a biphasic mixture of diesel and salt water. Khayat and Zali-Boeini [62] demonstrated the phase-selective gelation of a series of sugar-based azobenzene derivatives 105-107 (Figure 17). For the demonstration, a solution of gelator 107 in toluene was added over the mixture of diesel and water.…”