Rubidium perchlorate

Some compounds, such as rubidium chromate and rubidium iodide, emit toxic vapors when heated. Other compounds, such as rubidium perchlorate, are irritants. 

Rubidium perchlorate, RbC104.—When rubidium chlorate is heated to a moderate temperature, it is converted into a mixture of perchlorate and chloride. The perchlorate is isomorphous with the corresponding potassium salt, but is less soluble in water, the solubility at 21-3° C. being 1-09 grams in 100 grams of water.13... 

The influence of alkali metal perchlorates on the photocyclisation of (34) has also been studied. The quantum yield for cyclization is reduced from 0.21 for the free system to 0.17 for irradiations in the presence of sodium perchlorate. The effect is even more dramatic with potassium and rubidium perchlorates when (j) is reduced to 0.02. The crown ether systems are obviously important since the overall shape can be controlled by the photochemical ring closure. 

Potassium and rubidium perchlorates have been observed to decrease the photocyclisation quantum yield of l,2-bis(2,4-dimethylthien-3-yl)perfluorocy-clopentene having two benzo-15-crown-5 ethers (101), and this has been ascribed to increases in the ratio of the photoinactive parallel conformational analogue of (101) by intramolecular interaction of the two crown ether moieties with a metal ion. ... 

Macrotricyclic anthracenyl receptor 31 (Structure 19) having both hydrophilic and hydrophobic parts displays a dual fluorescence emission spectrum (monomer and excimer type emissions). Rubidium perchlorate or 1,7-di-aminoheptane dihydrochloride is selectively bound by this receptor. The bindings are considered to occur with only the hydrophilic part or with the simultaneously working hydrophilic and hydrophobic parts. The complexation strongly affected the spectrum [68]. 

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