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Colorful Chemical FountainsNicholas C. Thomas and Stephen Faulk A chemical fountain, constructed from several vertically stacked plastic champagne cups, is used to demonstrate acidbase and chemiluminescence reactions. Thomas, Nicholas C.; Faulk, Stephen. J. Chem. Educ.2008, 85, 1061.
Acids / Bases |
Dyes / Pigments |
Physical Properties |
Reactions
Prussian Blue: Artists' Pigment and Chemists' SpongeMike Ware The variable composition of Prussian blue tantalized chemists until investigations by X-ray crystallography in the late 20th century explained its many properties and uses. Ware, Mike. J. Chem. Educ.2008, 85, 612.
Molecular Models of DyesWilliam F. Coleman The paper on the synthesis of several dyes by James V. McCullagh and Kelly A. Daggett (1) provides us with the JCE Featured Molecules for this month. The authors mention various applications of these dyes, ranging from commercial dyeing to techniques for determining the course of complex biochemical processes. One of the reaction products, rhodamine B, is a member of a family of molecules that are widely used as tunable laser dyes. In this application, the rhodamines are most commonly encountered in a cationic form, rather than in the neutral form shown in the paper. In the cations, the carboxyl group is no longer part of a ring system. Several different members of the rhodamine family are included in the molecule collection because substituents have a marked effect on the effective lasing range of a given dye. Additionally, the solvent and the excitation source also influence the lasing range (2). Students can learn more about the relationship between structure, absorption and emission properties, and lasing ranges of various dyes by consulting ref 2 and from PhotochemCAD, Jonathan Lindsey's free application (3).
Dyes / Pigments
Tin and Lead Volume 03, issue 26 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Metallurgy |
Dyes / Pigments
Chromium and Its Relatives Volume 03, issue 29 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
