A water-soluble cyclometalated iridium(iii) complex for pH sensing based on aggregation-induced enhanced phosphorescence

2019 ◽  
Vol 48 (23) ◽  
pp. 8068-8075 ◽  
Author(s):  
Keiji Ohno ◽  
Tetuya Sakata ◽  
Machi Shiiba ◽  
Akira Nagasawa ◽  
Takashi Fujihara
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Water Soluble ◽  
The Novel ◽  
Ph Sensing ◽  
Ph Responsive ◽  
Protonated Species

The novel Na[Ir(ppy)2(SB-COO)] (Hppy = phenylpyridine; HSB-COOH = 4-carboxylanilinesalicylaldehyde Schiff base) in aqueous solution showed pH-responsive aggregation-induced enhanced phosphorescence (AIEP) by the formation of the protonated species [Ir(ppy)2(SB-COOH)].

scholarly journals pH Responsive Self-Assembly of Cucurbit[7]urils and Polystyrene-Block-Polyvinylpyridine Micelles for Hydrophobic Drug Delivery

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Basem A. Moosa ◽  
Afnan Mashat ◽  
Wengang Li ◽  
Karim Fhayli ◽  
Niveen M. Khashab
Keyword(s):  
Drug Delivery ◽  
Aqueous Solution ◽  
Self Assembly ◽  
Room Temperature ◽  
Water Soluble ◽  
Hydrophobic Drug ◽  
Ph Responsive ◽  
Ph Values ◽  
Neutral Ph ◽  
Release Study

Polystyrene-block-polyvinylpyridine (PS-b-P4VP) polypseudorotaxanes with cucurbit[7]urils (CB[7]) were prepared from water soluble PS-b-P4VPH+polymer and CB[7] in aqueous solution at room temperature. At acidic and neutral pH, the pyridinium block of PS-b-P4VP is protonated (PS-b-P4VPH+) pushing CB[7] to preferably host the P4VP block. At basic pH (pH 8), P4VP is not charged and thus is not able to strongly complex CB[7]. This phenomenon was verified further by monitoring the release of pyrene, a hydrophobic cargo model, from a PS-b-P4VPH+/CB[7] micellar membrane. Release study of UV active pyrene from the membrane at different pH values revealed that the system is only operational under basic conditions and that the host-guest interaction of CB[7] with P4VPH+significantly slows down cargo release.

A reversible fluorescent pH-sensing system based on the one-pot synthesis of natural silk fibroin-capped copper nanoclusters

2016 ◽  
Vol 4 (16) ◽  
pp. 3540-3545 ◽  
Author(s):  
Guomei Zhang ◽  
Ting Xu ◽  
Huizhi Du ◽  
Yunyun Qiao ◽  
Xiaohong Guo ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Silk Fibroin ◽  
Water Soluble ◽  
Ph Sensing ◽  
Ph Responsive ◽  
Copper Nanoclusters ◽  
One Pot ◽  
Natural Silk ◽  
Sensing System ◽  
The One

A one-pot “green” synthesis of water soluble and pH-responsive natural silk fibroin (SF)-stabilized fluorescent copper nanoclusters (CuNCs) was reported without using any additional reducing agents.

scholarly journals 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 ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 573 ◽  
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+.

One-step prepared fluorescent copper nanoclusters for reversible pH-sensing

The Analyst ◽  
2014 ◽  
Vol 139 (12) ◽  
pp. 2990-2993 ◽  
Author(s):  
Wei Wang ◽  
Fei Leng ◽  
Lei Zhan ◽  
Yong Chang ◽  
Xiao Xi Yang ◽  
...  
Keyword(s):  
Reducing Agents ◽  
Water Soluble ◽  
Ph Sensing ◽  
Ph Responsive ◽  
Copper Nanoclusters ◽  
One Step

A one-step synthesis of water soluble and pH-responsive trypsin-stabilized fluorescent CuNCs was reported without using additional protective or reducing agents.

A well-defined alternating copolymer based on a salicylaldimine Schiff base for highly sensitive zinc(ii) detection and pH sensing in aqueous solution

2015 ◽  
Vol 6 (7) ◽  
pp. 1127-1136 ◽  
Author(s):  
Shangfeng Wang ◽  
Bin Wu ◽  
Feng Liu ◽  
Yun Gao ◽  
Weian Zhang
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Zinc Ions ◽  
Ph Sensing ◽  
Alternating Copolymer ◽  
Highly Sensitive ◽  
New Strategy

We report a new strategy to fabricate well-defined alternating Schiff base copolymers of poly(VBCDEG-alt-SaAEMI)s which display two distinguishable color fluorescence “OFF–ON” responses to zinc ions and pH in aqueous solution.

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

2020 ◽  
Vol 44 (26) ◽  
pp. 11148-11154 ◽  
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.

pH-responsive photoluminescence properties of a water-soluble copolymer containing quinoline groups in aqueous solution

2010 ◽  
Vol 48 (19) ◽  
pp. 2078-2083 ◽  
Author(s):  
Aliki Kalogianni ◽  
Eleftherios Pefkianakis ◽  
Andreas Stefopoulos ◽  
Georgios Bokias ◽  
Joannis K. Kallitsis
Keyword(s):  
Aqueous Solution ◽  
Water Soluble ◽  
Photoluminescence Properties ◽  
Ph Responsive ◽  
Water Soluble Copolymer

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

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, {Mo<sub>132</sub>} with chiral lactate ligands with the composition [Mo<sub>132</sub>O<sub>372</sub>(H<sub>2</sub>O)<sub>72</sub>(<i>x-</i>Lactate)<sub>30</sub>]<sup>42-</sup> (<i>x</i> = D or L), it was possible to study the interaction with a chiral guest, L/D-carnitine and (<i>R</i>/<i>S</i>)-2-butanol in aqueous solution. The enantioselective recognition was studied by quantitative <sup>1</sup>H NMR and <sup>1</sup>H 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 (K<i><sub>S</sub></i>/K<i><sub>R</sub></i> = 3) is observed for recognition within the capsule interior of (<i>R</i>)- and (<i>S</i>)-2-butanol.

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