scholarly journals Effect of crown ether ring size on binding and fluorescence response to saxitoxin in anthracylmethyl monoazacrown ether chemosensors

2006 ◽  
Vol 84 (10) ◽  
pp. 1273-1279 ◽  
Author(s):  
Hua Mao ◽  
John B Thorne ◽  
Jennifer S Pharr ◽  
Robert E Gawley
Keyword(s):  
Detection Limit ◽  
Crown Ether ◽  
Crown Ethers ◽  
Binding Constant ◽  
Binding Constants ◽  
Ring Size ◽  
Paralytic Shellfish Poison ◽  
Fluorescence Response ◽  
Paralytic Shellfish ◽  
Synthetic Routes

Convenient macrocyclization synthetic routes for the preparation of different-sized monoaza anthracylmethyl crown ether chemosensors (15-crown-5, 18-crown-6, 21-crown-7, 24-crown-8, and 27-crown-9) are described. Evaluation of these crowns as chemosensors for saxitoxin revealed that the larger crowns have moderately higher binding constants, with the 27-crown-9 chemosensor having the largest binding constant (2.29 × 105 (mol/L)–1). Fluorescence enhancements of 100% were observed at saxitoxin concentrations of 5 µmol/L, which is close to the detection limit in mouse bioassay.Key words: anthracene, crown ethers, saxitoxin, paralytic shellfish poison (PSP), binding constants; chemosensors.

A Boronic Acid-Based Fluorescence Hydrogel for Monosaccharide Detection

2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Boronic Acid ◽  
Binding Constants ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Hydrogel System

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>

Crown ethers in hydrogenated graphene

2021 ◽  
Author(s):  
Kai Guo ◽  
Sitong Liu ◽  
Haoming Tu ◽  
Zhikun Wang ◽  
Liang Chen ◽  
...  
Keyword(s):  
Crown Ether ◽  
Crown Ethers ◽  
Hydrogenated Graphene ◽  
High Flexibility

Crown ethers could serve as hosts to selectively incorporate various guest atoms or molecules within the macrocycles. However, the high flexibility of crown ether molecules limits their applications in areas...

Thermal Degradation of Paralytic Shellfish Poison

1991 ◽  
Vol 56 (6) ◽  
pp. 1572-1575 ◽  
Author(s):  
YUJI NAGASHIMA ◽  
TAMAO NOGUCHI ◽  
MUNEHIKO TANAKA ◽  
KANEHISA HASHIMOTO
Keyword(s):  
Thermal Degradation ◽  
Paralytic Shellfish Poison ◽  
Paralytic Shellfish

Acute toxicity of paralytic shellfish poison in rats of different ages

1966 ◽  
Vol 8 (2) ◽  
pp. 286-294 ◽  
Author(s):  
James S. Watts ◽  
J. Reilly ◽  
F.M. DaCosta ◽  
S. Krop
Keyword(s):  
Acute Toxicity ◽  
Paralytic Shellfish Poison ◽  
Paralytic Shellfish ◽  
Different Ages

1,8-Dioxyanthracene-Derived Crown Ethers: Synthesis, Complexation with Paraquat and Assembly of a Tetracationic Cyclophane-Crown Ether Based [2]Catenane

2014 ◽  
Vol 2014 (31) ◽  
pp. 6925-6934 ◽  
Author(s):  
Bo Tang ◽  
Hong-Mei Yang ◽  
Wen-Jing Hu ◽  
Ming-Liang Ma ◽  
Yahu A. Liu ◽  
...  
Keyword(s):  
Crown Ether ◽  
Crown Ethers
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