A facile fluorescent chemosensor based on a water-soluble porphyrin for Mo 6+ in aqueous solution

A water-soluble porphyrin bearing multi-dentate ligands was prepared, and its aggregation behavior in solution under various conditions (temperature, pH, metal ion, chiral compound) was investigated using UV-vis absorption spectroscopy, fluorescence spectroscopy, circular dichroism (CD) spectroscopy. Upon the addition of Ca2+, Ba2+ , or Sr2+ to a solution of porphyrin, the porphyrin first forms an H-aggregate and is then transformed to a J-aggregate at 25 °C in buffered aqueous solution (pH 7.4). On the other hand, the porphyrin forms a self-aggregate (H-aggregate) at 25 °C in buffered aqueous solution (pH 6.0), and the H-aggregate does not form the J-aggregate upon the addition of the group II metal ions. The measurement of CD spectra revealed that the H-aggregate that forms right after the addition of Ba2+ to the porphyrin solution in the presence of D- or L-phenylalanine does not show an induced CD signal, while the J-aggregate formed from the H-aggregate shows induced CD signals in the Soret region.

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Roles of Interfacial Functions in Analytical Chemistry. Orientation of water-soluble porphyrin incorporated with surfactant admicelles at a glass-aqueous solution interface by means of variable-angle total internal-reflection spectroscopy.

BUNSEKI KAGAKU ◽

10.2116/bunsekikagaku.47.1041 ◽

1998 ◽

Vol 47 (12) ◽

pp. 1041-1047 ◽

Cited By ~ 1

Author(s):

Teruo HINOUE ◽

Junji KOBAYASHI ◽

Hitoshi WATARAI

Keyword(s):

Analytical Chemistry ◽

Aqueous Solution ◽

Total Internal Reflection ◽

Internal Reflection ◽

Water Soluble ◽

Reflection Spectroscopy ◽

Solution Interface ◽

Variable Angle ◽

Water Soluble Porphyrin ◽

Internal Reflection Spectroscopy

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A Highly Selective Turn-on and Reversible Fluorescent Chemosensor for Al3+ Detection Based on Novel Salicylidene Schiff Base-Terminated PEG in Pure Aqueous Solution

Polymers ◽

10.3390/polym11040573 ◽

2019 ◽

Vol 11 (4) ◽

pp. 573 ◽

Cited By ~ 4

Author(s):

Liping Bai ◽

Yuhang Xu ◽

Guang Li ◽

Shuhui Tian ◽

Leixuan Li ◽

...

Keyword(s):

Aqueous Solution ◽

Schiff Base ◽

Ethylenediaminetetraacetic Acid ◽

Logic Gate ◽

Water Soluble ◽

Fluorescent Chemosensor ◽

Water Soluble Polymer ◽

Fluorescence Response ◽

Turn On ◽

Pure Aqueous Solution

The development of highly selective and sensitive chemosensors for Al3+ detection in pure aqueous solution is still a significant challenge. In this work, a novel water-soluble polymer PEGBAB based on salicylidene Schiff base has been designed and synthesized as a turn-on fluorescent chemosensor for the detection of Al3+ in 100% aqueous solution. PEGBAB exhibited high sensitivity and selectivity to Al3+ over other competitive metal ions with the detection limit as low as 4.05 × 10−9 M. PEGBAB displayed high selectivity to Al3+ in the pH range of 5–10. The fluorescence response of PEGBAB to Al3+ was reversible in the presence of ethylenediaminetetraacetic acid (EDTA). Based on the fluorescence response, an INHIBIT logic gate was constructed with Al3+ and EDTA as two inputs. Moreover, test strips based on PEGBAB were fabricated facilely for convenient on-site detection of Al3+.

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An efficient water-soluble fluorescent chemosensor based on furan Schiff base functionalized PEG for the sensitive detection of Al3+ in pure aqueous solution

New Journal of Chemistry ◽

10.1039/d0nj01856b ◽

2020 ◽

Vol 44 (26) ◽

pp. 11148-11154 ◽

Cited By ~ 3

Author(s):

Liping Bai ◽

Yuhang Xu ◽

Leixuan Li ◽

Farong Tao ◽

Shuangshuang Wang ◽

...

Keyword(s):

Aqueous Solution ◽

Schiff Base ◽

Polyethylene Glycol ◽

Water Soluble ◽

Sensitive Detection ◽

Fluorescent Chemosensor ◽

Base Unit ◽

Pure Aqueous Solution

An efficient reversible fluorescent chemosensor, PEGFB, based on polyethylene glycol bearing a furan Schiff base unit has been successfully developed to sensitively detect Al3+ in pure aqueous solution.

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Supramolecular functionalization of single-walled carbon nanotubes with uncharged water-soluble porphyrins

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424608000145 ◽

2008 ◽

Vol 12 (02) ◽

pp. 109-115 ◽

Cited By ~ 6

Author(s):

Su Hee Jung ◽

Hee-Joon Kim

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Side Wall ◽

Single Walled Carbon Nanotubes ◽

Water Soluble ◽

Supramolecular Interactions ◽

Single Walled Carbon ◽

Atomic Force ◽

Water Soluble Porphyrin ◽

Walled Carbon Nanotubes

We synthesized an uncharged water-soluble porphyrin, meso-tetrakis-(3,4,5-tri-{2-[2-(2-methoxy-ethoxy)-ethoxy]-ethoxy}-phenyl)-porphyrin, to solubilize single-walled carbon nanotubes (SWNTs) in aqueous solutions through supramolecular interactions. The porphyrin-SWNTs composites in aqueous solution are stable for several weeks. The porphyrin-SWNTs composites in aqueous solution have been characterized by UV-vis absorption and fluorescence spectroscopy and with atomic force microscope (AFM). The fluorescence emitted from the porphyrin ring in the aqueous solution of the porphyrin-SWNTs composite is highly quenched, evidently implying the presence of strong electronic interactions between the SWNTs and the porphyrin molecules in aqueous solution. The AFM investigation furthermore supports that the porphyrin molecules are complexed on the SWNTs side wall through π-π interaction.

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Enantioselective Recognition of Chiral Guests by the Water-Soluble Chiral Keplerate {Mo132} Spherical Capsule with 30 Inner Lactate Ligands

10.26434/chemrxiv.8847923.v1 ◽

2019 ◽

Author(s):

Nancy Watfa ◽

Weimin Xuan ◽

Zoe Sinclair ◽

Robert Pow ◽

Yousef Abul-Haija ◽

...

Keyword(s):

Aqueous Solution ◽

Chiral Recognition ◽

Association Constants ◽

Water Soluble ◽

Enantioselective Recognition ◽

H Nmr ◽

Dosy Nmr ◽

Spherical Capsule ◽

Surface Pores ◽

Guest Chemistry

Investigations of chiral host guest chemistry are important to explore recognition in confined environments. Here, by synthesizing water-soluble chiral porous nanocapsule based on the inorganic metal-oxo Keplerate-type cluster, {Mo132} with chiral lactate ligands with the composition [Mo132O372(H2O)72(x-Lactate)30]42- (x = D or L), it was possible to study the interaction with a chiral guest, L/D-carnitine and (R/S)-2-butanol in aqueous solution. The enantioselective recognition was studied by quantitative 1H NMR and 1H DOSY NMR which highlighted that the chiral recognition is regulated by two distinct sites. Differences in the association constants (K) of L- and D-carnitine, which, due to their charge, are generally restricted from entering the interior of the host, are observed, indicating that their recognition predominantly occurs at the surface pores of the structure. Conversely, a larger difference in association constants (KS/KR = 3) is observed for recognition within the capsule interior of (R)- and (S)-2-butanol.

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Sulfobetaine Cryogels for Preferential Adsorption of Methyl Orange from Mixed Dye Solutions

Polymers ◽

10.3390/polym13020208 ◽

2021 ◽

Vol 13 (2) ◽

pp. 208

Author(s):

Ramona B. J. Ihlenburg ◽

Anne-Catherine Lehnen ◽

Joachim Koetz ◽

Andreas Taubert

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Methyl Orange ◽

Dye Removal ◽

Selective Adsorption ◽

Water Soluble ◽

Organic Substances ◽

Preferential Adsorption ◽

Dimethyl Ammonium ◽

Dye Solutions

New cryogels for selective dye removal from aqueous solution were prepared by free radical polymerization from the highly water-soluble crosslinker N,N,N’,N’-tetramethyl-N,N’-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The resulting white and opaque cryogels have micrometer sized pores with a smaller substructure. They adsorb methyl orange (MO) but not methylene blue (MB) from aqueous solution. Mixtures of MO and MB can be separated through selective adsorption of the MO to the cryogels while the MB remains in solution. The resulting cryogels are thus candidates for the removal of hazardous organic substances, as exemplified by MO and MB, from water. Clearly, it is possible that the cryogels are also potentially interesting for removal of other compounds such as pharmaceuticals or pesticides, but this must be investigated further.

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