Acid-base equilibriums, kinetics of copper ion incorporation, and acid-catalyzed zinc ion displacement from the water-soluble porphyrin .alpha.,.beta.,.gamma.,.delta.-tetrakis(1-methyl-4-pyridinio)porphine tetraiodide

1970 ◽  
Vol 9 (7) ◽  
pp. 1757-1761 ◽  
Author(s):  
Peter Hambright ◽  
Everly B. Fleisher
Keyword(s):  
Copper Ion ◽  
Zinc Ion ◽  
Water Soluble ◽  
Gamma Delta ◽  
Acid Base ◽  
Acid Catalyzed ◽  
Alpha Beta ◽  
Water Soluble Porphyrin ◽  
Ion Incorporation ◽  
Kinetics Of

Kinetics of zinc ion incorporation in base into a centrally aprotic beta-octabrominated cationic water-soluble porphyrin and its monolithium complex

2001 ◽  
Vol 05 (12) ◽  
pp. 829-834 ◽  
Author(s):  
SABRINA L. BAILEY ◽  
P. HAMBRIGHT
Keyword(s):  
Formation Constant ◽  
Zinc Ion ◽  
Water Soluble ◽  
Specific Rate ◽  
First Order ◽  
Specific Rate Constant ◽  
Zinc Concentrations ◽  
Water Soluble Porphyrin ◽  
Ion Incorporation ◽  
Kinetics Of

The kinetics of zinc incorporation from pH 12 to 13 into the centrally aprotic BrP (4)2+ form of beta-octabromo-meso-tetrakis(N-methyl-4-pyridyl)porphyrin and its monolithium complex were studied at 25.0 °C, ionic strength (I) = 0.10. The reactions were first order in porphyrin and total zinc concentrations. For BrP (4)2+, the specific rate constant was 5.1 × 105 M -1 s -1 for Zn ( OH )2 aq , 9.9 × 104 M -1 s -1 for [Formula: see text] and [Formula: see text] was unreactive. The Li - BrP (4)3+ complex had a formation constant with BrP (4)2+ of 1.1 × 103 M -1 from both kinetic and equilibrium measurements. In solutions containing both BrP (4)2+ and Li - BrP (4)3+, zinc incorporation proceeded only through BrP (4)2+.

Synthesis, Acid-Base Properties, Kinetics and Mechanism of Cu2+ Incorporation into Water-Soluble Highly Substituted Porphyrins

2017 ◽  
Vol 21 (09) ◽  
pp. 611-621
Author(s):  
Hirofumi Konno ◽  
Jun Takeda
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Kinetics And Mechanism ◽  
Water Soluble ◽  
Acid Base ◽  
Base Equilibrium ◽  
Absorbance Change ◽  
Acid Base Equilibrium ◽  
Kinetics Of ◽  
Base Properties

The synthesis, acid-base properties, and kinetics of Cu[Formula: see text] incorporation into water-soluble highly substituted porphyrins were studied. The basicity increased and the stepwise acid-base equilibrium was clarified by increasing the number of phenyl groups at the [Formula: see text] position, and the basicity of a dodeca-substituted porphyrin increased with the ionic strength. The metalation reaction of the dodeca-substituted porphyrin with Cu[Formula: see text] in aqueous solution revealed a biphasic absorbance change at 453 nm. Plots of [Formula: see text] or[Formula: see text] vs. the Cu[Formula: see text] concentration and of log ([Formula: see text] or[Formula: see text]/[Formula: see text] 0) vs. the ionic strength show that [Formula: see text] is dependent on the Cu[Formula: see text] concentration and ionic strength, while [Formula: see text] is independent of these parameters. These results confirm the stepwise metalation mechanism and the existence of an intermediate in aqueous solution, which is indicated by the biphasic absorbance change at 453 nm.

Kinetics of the displacement of gadolinium(III) from a water-soluble porphyrin by EDTA

1988 ◽  
Vol 27 (9) ◽  
pp. 1660-1662 ◽  
Author(s):  
Peter Hambright ◽  
Curtis Adams ◽  
Kurt Vernon
Keyword(s):  
Water Soluble ◽  
Water Soluble Porphyrin ◽  
Kinetics Of

Water-soluble porphyrin-based logic gates

2012 ◽  
Vol 16 (01) ◽  
pp. 72-76 ◽  
Author(s):  
Lili Li ◽  
Peiying Cai ◽  
Yuefei Deng ◽  
Liutao Yang ◽  
Xuan He ◽  
...  
Keyword(s):  
Metal Ions ◽  
Logic Gates ◽  
Water Soluble ◽  
Porphyrin Molecule ◽  
Acid Base ◽  
Fluorescent Spectra ◽  
Simple Logic ◽  
Logic Operations ◽  
Water Soluble Porphyrin

A series of simple logic gates based on a water-soluble porphyrin molecule, 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin (TPPS4) is designed. Logic operations, including OR, NOR, INHIBIT and AND, have been built by two inputs of acid/base or metal ions (Al3+ and/or Sn4+) and two outputs of UV-vis absorption and fluorescent spectra. An OFF–ON switch triggered by Al3+ ion in vitro is developed based on TPPS4.

Sign in / Sign up

Export Citation Format

Share Document