Numerical investigation of thermo-physical properties of non-newtonian fliud in a modelled intestine

Ibitoye, Segun E.; Adegun, I. K.; Omoniyi, Peter; Ogedengbe, Temitayo S.; Alabi, O.O.

doi:10.1016/j.jobab.2020.07.007

Cited by 15 publications

(9 citation statements)

References 15 publications

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“… − TGA curves, performed under an N 2 stream, were determined to evaluate the thermal stability of the skeletons (Figure S4). − For 1 , the preliminary 7.5% weight loss before about 255 °C was ascribed to the removal of a half-molecule of H 2 O (calculated 7.4%), after which the skeleton remained stable until a structural collapse at 315 °C. Compound 2 was stable until 335 °C with an 8.7% weight loss, corresponding to the release of one coordinated H 2 O and a half-molecule of free H 2 O (calculated 7.4%), and then began to collapse.…”

Section: Resultsmentioning

confidence: 99%

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Wang

Zhang

Yang

et al. 2021

Crystal Growth & Design

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The two functional fluorinated ligands 2-fluoro-4-(1H-tetrazol-5-yl)benzoic acid (2-F-H2tzba) and 3-fluoro-4-(1H-tetrazol-5-yl)benzoic acid (3-F-H2tzba) were obtained by modifying 4-(1H-tetrazol-5-yl)benzoic acid (H2tzba) embedded with fluorine. Two isostructural 3D Cd2+ coordination polymers (CPs), {[Cd(2-F-tzba)(H2O)]·1.5H2O} n (1) and {[Cd(3-F-tzba)(H2O)]·1.5H2O} n (2), were constructed using the hydrothermal method, in which the binuclear clusters [Cd2(tetrazolate)2] serving as 6-connected secondary building units (SBUs) are linked by six ligands to generate (3,6)-connected (4·62)2(42·610·83)-rtl binodal 3D nets. Compounds 1 and 2 simultaneously show excellent chemical and thermal stability in water systems at different pH levels (pH 3–10). The calculated structures for the ligands and compounds were further investigated by density functional theory (DFT) calculations to compare the structures and fluorescence properties of two fluorine-decorated skeletons. In comparison to 2, 1 displayed more efficient fluorescence sensing toward tetracycline (TET), doxycycline (DOX), oxytetracycline (OTC), and chlortetracycline (CTC) in water systems with a lower low detection limit (LOD) and a rapid response. The fluorescence quenching mechanism was explored through a combination of experimental data and DFT calculations.

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Section: Resultsmentioning

confidence: 99%

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Wang

Zhang

Yang

et al. 2021

Crystal Growth & Design

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“…After 24 h soaking 1 in these solvents, the experimental PXRD patterns of 1 were also consistent with theoretical pattern, indicating that 1 was stable in these solvents ( Figure 2 b). The slight variation of diffraction intensity may be related to the different crystal orientation or solvent effects [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine

et al. 2021

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Metal-organic frameworks (MOFs) have been rapidly developed for their broad applications in many different chemistry and materials fields. In this work, a multi-dentate building block 5-(4-(tetrazol-5-yl)phenyl)-isophthalic acid (H3L) containing tetrazole and carbolxylate moieties was employed for the synthesis of a two-dimensional (2D) lanthanide MOF [La(HL)(DMF)2(NO3)] (DMF = N,N-dimethylformamide) (1) under solvothermal condition. The fluorescent sensing application of 1 was investigated. 1 exhibits high sensitivity recognition for antibiotic nitrofurantoin (Ksv: 3.0 × 103 M−1 and detection limit: 17.0 μM) and amino acid l-tyrosine (Ksv: 1.4 × 104 M−1 and detection limit: 3.6 μM). This work provides a feasible detection platform of 2D MOFs for highly sensitive discrimination of antibiotics and amino acids.

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“…Three steps of weightlessness are shown within the test temperature range based on TG curve. Something similar to thermophysical properties have been studied recently [15–19] . The first step, 70∼140 °C, is the departure of four coordinated water molecules, and weight loss percentage is 5.9 % (calc.…”

Section: Resultsmentioning

confidence: 79%

“…Something similar to thermophysical properties have been studied recently. [15][16][17][18][19] The first step, 70~140°C, is the departure of four coordinated water molecules, and weight loss percentage is 5.9 % (calc. 5.6 %).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu²⁺ ion

Yin

Kan

2021

Zeitschrift anorg allge chemie

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A novel barium(II) coordination polymer (CP), [Ba 3 (L) 2 (H 2 O) 4 ] n 1, has been firstly isolated based on organic ligand 1- [(2'carboxybiphenyl-4-yl)methyl]-2-propylimidazole-4,5-dicarboxylic acid (H 3 L=(HO 2 C) 2 (C 3 N 2 )(C 3 H 7 )CH 2 (C 6 H 4 )(C 6 H 3 )CO 2 H) by hydrothermal technique, and determined by single-crystal X-ray diffractions, elemental analysis, IR, powder X-ray diffractions (PXRD). The Ba(II)-CP 1 belongs to a novel 2-D layer structure created from 1-D serrated chain containing secondary building unit (SBU) [Ba(1)Ba(2)Ba( 3)] via carboxylate group linkage. In 1, the ligand L 3À gives a variety of coordinated styles, nonadentate: μ 2 :(η 1 η 1 ), μ 2 :(η 1 η 1 ), μ 3 :(η 2 η 2 ) and decadentate: μ 1 :(η 1 η 1 ), μ 3 :(η 2 η 2 ), μ 3 :(η 1 η 2 ), μ 3 :(η 1 η 2 ), which is the first reported example.Moreover, the room-temperature fluorescent measurements show that the Ba(II)-CP 1 has specific ability to recognize copper(II) ion in aqueous solution by means of fluorescence quenching effect, corresponding obtained quenching constant K sv = 1.18 × 10 2 M À 1 and the limit of detection LOD = 0.274 μM. Fluorescence titration experiment reveals that there is a good linear relationship between copper ion concentration and fluorescence intensity in the concentration range of 2.0 × 10 À 65 .3 × 10 À 6 mol • L À 1 . The corresponding linear equation: y = 402.41897-0.70486x, and linear correlation coefficient: R 2 = 0.99866 (λ ex = 310 nm and λ em = 412 nm).

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Numerical investigation of thermo-physical properties of non-newtonian fliud in a modelled intestine

Cited by 15 publications

References 15 publications

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine

Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu²⁺ ion

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Numerical investigation of thermo-physical properties of non-newtonian fliud in a modelled intestine

Cited by 15 publications

References 15 publications

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Fluorine-Substituted Regulation in Two Comparable Isostructural Cd(II) Coordination Polymers: Enhanced Fluorescence Detection for Tetracyclines in Water

Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine

Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu2+ ion

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Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu²⁺ ion