Aza-BODIPY-based logic gate chemosensors and their applications.

Dimethylaniline-substituted aza-BODIPY dyes (DA, DM, DP) were designed and synthesized aiming for ion detection. The Zn recognition ability was found in all compounds and the binding mechanism was possibly via dimethylaniline sites linked to the aza-BODIPY core. Upon Zn addition, the new absorption band and the color change occurred due to the altered charge transfer of the adducts.

Colorimetric Cu Detection of (1,2)-1,2-Bis((1-pyrrol-2-yl)methylene)hydrazine Using a Custom-Built Colorimeter.

The compound (1,2)-1,2-bis((1-pyrrol-2-yl)methylene)hydrazine () was investigated for its chemosensor application. The colorimetric response of with various ions was investigated, and the selective optical change upon mixing with Cu was found. The Cu binding stoichiometry of derived from Job's plot and the study give us the tentative structural detail of the binding mode of and Cu being 1:1.

New 1,1'-Ferrocene Bis(sulfonyl) Reagents.

Several new 1,1'-bis(sulfonyl)ferrocenes designed for the synthesis of sulfonamide linked biological conjugates have been prepared. 1,1'-Bis(sulfonylbromide)ferrocene can be produced from the corresponding sulfonylchloride via a bis(sulfonylhydrazide) intermediate. Bis(sulfonyl--hydroxybenzotriazole)ferrocene can also be synthesized from the sulfonyl chloride, and reaction of glycine methyl ester with the sulfonyl chloride affords a [3]ferrocenophane complex.

Using Hydrazine to Link Ferrocene with Re(CO): A Modular Approach.

Acetyl ferrocene and diacetyl ferrocene both readily react with an excess of hydrazine to afford the corresponding hydrazone compounds. These compounds can then be linked to Re(CO) via a metal-mediated Schiff base reaction, resulting in a series of ferrocene-Re(CO) conjugates with different stoichiometries. Conjugates with 1:1, 1:2, and 2:1 ferrocene: Re(CO) ratios can be produced via this "modular" type synthesis approach.