Evaluation of the relative effectiveness of different water-soluble .beta.-cyclodextrin media to function as fluorescence enhancement agents

1991 ◽  
Vol 63 (24) ◽  
pp. 2924-2933 ◽  
Author(s):  
Raymond P. Frankewich ◽  
K. N. Thimmaiah ◽  
Willie L. Hinze
Keyword(s):  
Fluorescence Enhancement ◽  
Relative Effectiveness ◽  
Water Soluble ◽  
Beta Cyclodextrin

scholarly journals Photophysical Studies of a New Water Soluble Indocarbocyanine Dye Adsorbed onto Microcrystalline Cellulose and beta-Cyclodextrin

Molecules ◽  
2013 ◽  
Vol 18 (5) ◽  
pp. 5648-5668 ◽  
Author(s):  
Reda El-Shishtawy ◽  
Anabela Oliveira ◽  
Paulo Almeida ◽  
Diana Ferreira ◽  
David Conceição ◽  
...  
Keyword(s):  
Microcrystalline Cellulose ◽  
Water Soluble ◽  
Beta Cyclodextrin ◽  
Photophysical Studies

One-pot development of water soluble copper nanoclusters with red emission and aggregation induced fluorescence enhancement

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34090-34095 ◽  
Author(s):  
Dan Li ◽  
Zhenhua Chen ◽  
Zhanghui Wan ◽  
Tiezhu Yang ◽  
Hao Wang ◽  
...  
Keyword(s):  
Fluorescence Enhancement ◽  
Water Soluble ◽  
Copper Nanoclusters ◽  
One Pot ◽  
Red Emission

The binding of Zn2+ and Al3+ to OH on the copper core of Cu NCs promotes the formation of Cu NC–OH–Zn–OH–Cu NCs and Cu NC–OH–Al–OH–Cu NCs aggregates, which enables aggregation induced fluorescence enhancement.

scholarly journals Synthesis of a water-soluble 2,2′-biphen[4]arene and its efficient complexation and sensitive fluorescence enhancement towards palmatine and berberine

2018 ◽  
Vol 14 ◽  
pp. 2236-2241 ◽  
Author(s):  
Xiayang Huang ◽  
Xinghua Zhang ◽  
Tianxin Qian ◽  
Junwei Ma ◽  
Lei Cui ◽  
...  
Keyword(s):  
Association Constant ◽  
Fluorescence Enhancement ◽  
Phosphate Buffer Solution ◽  
Water Soluble ◽  
Binding Affinities ◽  
Buffer Solution ◽  
Solution Ph ◽  
H Nmr ◽  
Naked Eye ◽  
Nmr Signals

A water-soluble 2,2′-biphen[4]arene (2,2’-CBP4) containing eight carboxylato moieties was synthesized and characterized. Its complexation behavior towards two alkaloids, palmatine (P) and berberine (B), was investigated by means of fluorescence and 1H NMR spectroscopy in aqueous phosphate buffer solution (pH 7.4). In the presence of 2,2’-CBP4, 1H NMR signals of P and B displayed very large upfield shifts, indicating the formation of inclusion complexes with strong binding affinities. Fluorescence titration experiments showed that P and B exhibited dramatic fluorescence enhancement of more than 600 times upon complexation with 2,2’-CBP4. Particularly, the fluorescence intensity is strong enough to be readily distinguished by the naked eye. Although the two guests have similar structures, the association constant of B with 2,2’-CBP4 (K a = (2.29 ± 0.27) × 106 M−1) is 3.9 times larger than that of P (K a = (5.87 ± 0.24) × 105 M−1).

Aggregation-induced emission enhancement upon Al3+ complexation with a tetrasulfonated calix[4]bisazacrown fluorescent molecular sensor

2014 ◽  
Vol 12 (25) ◽  
pp. 4335-4341 ◽  
Author(s):  
Yi-Bin Ruan ◽  
Alexis Depauw ◽  
Isabelle Leray
Keyword(s):  
Fluorescence Enhancement ◽  
Water Soluble ◽  
Aggregation Induced Emission ◽  
Enhancement Mechanism ◽  
Molecular Sensor ◽  
Emission Enhancement ◽  
Ratiometric Detection ◽  
Soluble Ligand

A new water-soluble ligand bearing a tetrasulfonated calix[4]arene was constructed for ratiometric detection of Al3+ based on an aggregation-induced fluorescence enhancement mechanism.

Efficiency of nitric phosphates and Mussoorie rock phosphate in three cycles of clusterbean–wheat and groundnut–wheat rotations

1981 ◽  
Vol 97 (1) ◽  
pp. 197-203 ◽  
Author(s):  
H. S. Hundal ◽  
B. R. Arora ◽  
G. S. Sekhon
Keyword(s):  
Relative Efficiency ◽  
Rock Phosphate ◽  
Field Experiments ◽  
Farmyard Manure ◽  
Relative Effectiveness ◽  
Water Soluble ◽  
Straight Line ◽  
Soluble Phosphorus ◽  
Effective Source ◽  
Phosphatic Fertilizers

SUMMARYNitric phosphates containing 80, 50 and 30% water-soluble phosphorus, and Mussoorie rock phosphate, alone or with Amjhore pyrites, farmyard manure or straw, were compared relative to concentrated superphosphate for each of three cycles of a clusterbean–wheat and a groundnut–wheat rotation. Both the field experiments were made on alkaline P-deficient Samana sands. All phosphatic fertilizers were applied to each crop at the rate of 10, 20 and 30 kg P/ha. Dry forage of clusterbean, groundnut pods and grain yield of wheat were measured. The model of concurrent straight line response was employed to calculate availability coefficient ratios which express the relative effectiveness of the different phosphatic fertilizers.Nitric phosphate containing 80 % water-soluble phosphorus and concentrated superphosphate were almost equal in their effectiveness in both 3-year rotational studies of clusterbean–wheat and groundnut–wheat. The relative efficiency of the nitric phosphates increased with the amount of water-soluble phosphorus they contained. Mussoorie rock phosphate was the least effective source of fertilizer phosphorus, although its efficiency is considerably higher for the legume clusterbean and for groundnut than for the cereal wheat. The efficiency of Mussoorie rock phosphate increased when it was mixed with the soil together with Amjhore pyrites, farmyard manure and straw respectively. These materials were more effective for clusterbean and groundnut than for wheat.

scholarly journals Cavity Closure of 2-Hydroxypropyl-β-cyclodextrin: Replica Exchange Molecular Dynamics Simulations

2019 ◽  
Author(s):  
Khanittha Kerdpol ◽  
Jintawee Kicuntod ◽  
Peter Wolschann ◽  
Seiji Mori ◽  
Chompoonut Rungnim ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Conformational Changes ◽  
Inclusion Complexation ◽  
Water Soluble ◽  
Replica Exchange ◽  
Radius Of Gyration ◽  
Replica Exchange Molecular Dynamics ◽  
Beta Cyclodextrin ◽  
Dynamics Simulations

2-Hydroxypropyl-β-cyclodextrin (HPβCD) has unique properties to enhance the stability and the solubility of low water-soluble compounds by inclusion complexation. Understanding of the structural properties of HPβCD and its derivatives based on the number of 2-hydroxypropyl (HP) substituents at the a-D-glucopyranose subunits is rather important. In this work, replica exchange molecular dynamics simulations were performed to investigate the conformational changes of single- and double-sided HP-substitution called as 6-HPβCDs and 2,6-HPβCDs, respectively. The results show that glucose subunits in both 6-HPβCDs and 2,6-HPβCDs have lower chance to flip than in βCD. Also, HP groups are occasionally blocking the hydrophobic cavity of HPβCDs, thus hindering the drug inclusion. We found that HPβCDs with high number of HP-substitutions are more likely to be blocked, while HPβCDs with double-sided HP-substitution are even more probable to be blocked. Overall, 6-HPβCDs with three and four HP-substitutions are highlighted as the most suitable structures for guest encapsulation based on our conformational analyses such as structural distortion, radius of gyration, circularity and cavity self-closure of the HPβCDs.

scholarly journals Carboxylato-Pillar[6]arene-Based Fluorescent Indicator Displacement Assays for Caffeine Sensing

2021 ◽  
Vol 9 ◽  
Author(s):  
Qunpeng Duan ◽  
Yibo Xing ◽  
Kainan Guo
Keyword(s):  
Charge Transfer ◽  
Fluorescence Enhancement ◽  
Intramolecular Charge Transfer ◽  
Colour Change ◽  
Fluorescent Dye ◽  
Water Soluble ◽  
Selective Detection ◽  
Fluorescent Indicator ◽  
Displacement System ◽  
Displacement Assays

In the present work, we have developed a new indicator displacement system based on pillararene for anionic water-soluble carboxylato pillar [6] arene (WP6) and aromatic fluorescent dye safranine T (ST). A large fluorescence enhancement and colour change of ST were observed after complexation with electron-rich cavity in WP6 because of host-guest twisted intramolecular charge-transfer interactions. The constructed pillararene-indicator displacement system can be applied for caffeine selective detection in water.

scholarly journals Supramolecular interaction of sanguinarine dye with sulfobutylether-β-cyclodextrin: modulation of the photophysical properties and antibacterial activity

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 25370-25378
Author(s):  
Vidya Kadam ◽  
Aarti S. Kakatkar ◽  
Nilotpal Barooah ◽  
Suchandra Chatterjee ◽  
Achikanath C. Bhasikuttan ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Photophysical Properties ◽  
Water Soluble ◽  
Supramolecular Interaction ◽  
Beta Cyclodextrin

The noncovalent host-guest interaction of sanguinarine (SGR) with a nontoxic, water soluble sulfobutylether-beta-cyclodextrin macrocyclic host modulates the photophysical properties, improves the photostability and antibacterial activity of SGR.

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