There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

https://www.chem.ccu.edu.tw/~joyce/referance/gump/IL/Chem.%20Rev.%201999,%2099,%202071.pdf

Room-Temperature Ionic Liquids. Solvents for Synthesis and Catalysis

J. Appl. Cryst.の発刊に際して

Polydopamine and Its Derivative Materials: Synthesis and Promising Applications in Energy, Environmental, and Biomedical Fields

Schiff base-derived homogeneous and heterogeneous palladium catalysts for the Suzuki–Miyaura reaction

Dopamine, 6-hydroxydopamine, iron, and dioxygen--their mutual interactions and possible implication in the development of Parkinson's disease.

The isokinetic relationship

A detailed kinetic study has been carried out of the reaction of dopamine, 2-(3,4-dihydroxyphenyl)ethylamine, with dioxygen over the pH range 7–9 where it reacts spontaneously without the necessity of metal ion catalysis. The reaction was found to be accurately first-order in [O2] and in [dopamine] and first-order in [H+]–1 and, furthermore, stoichiometric amounts of H2O2 were shown to be produced. The other product of oxidation is, initially, the pink dopaminochrome which, however, is not stable and reacts further (without the consumption of dioxygen) to form the insoluble polymeric material known as ‘melanine’. The rate-determining step is assumed to be hydrogen atom abstraction from the monodeprotonated species by O2(as with many other catecholamines, dopamine is stable towards oxidation in acidic media in the complete absence of metal ions) with a second-order rate constant of k1= 0.47 ± 0.05 dm3 mol–1 s–1 at 25 °C in a solution of ionic strength 0.1 mol–1 dm–3(KCl).

Spontaneous autoxidation of dopamine

Improved hydrogen bond donor (HBD) strength parameters of 1-butyl-3-methylimidazolium room temperature ionic liquids (RTILs), acceptor number (AN) of Gutmann and α of Kamlet–Taft, have been determined using [Fe(phen)2(CN)2]ClO4 as an original solvatochromic probe. Each of the parameters shows an excellent correlation with the independently determined HBA strength β (Kamlet–Taft) of the anion which demonstrates that empirical polarity parameters of RTILs can be utilized independently of each other.

Wolfgang Linert

Papers

Schiff base-derived homogeneous and heterogeneous palladium catalysts for the Suzuki–Miyaura reaction

Dopamine, 6-hydroxydopamine, iron, and dioxygen--their mutual interactions and possible implication in the development of Parkinson's disease.

The isokinetic relationship

Spontaneous autoxidation of dopamine

New aspects on the hydrogen bond donor (HBD) strength of 1-butyl-3-methylimidazolium room temperature ionic liquids