A selective fluorescent chemodosimeter for mercury ion based on the mercury-promoted intramolecular cyclic guanylation of thiourea connected on 1, 8-naphthalimide is described.

Silica nanoparticles functionalized with chromogenic spirobenzopyran and thiourea subunits show selective colour changes in the presence of certain long-chain carboxylates.

Highly ordered short-channel mesoporous silica SBA-15 with large pores (11.2 nm) was synthesized from tetramethyl orthosilicate, using the block copolymer Pluronic PE-10400 as structure-directing agent, and triisopropylbenzene a swelling agent.

The recent discovery of the rodenticidal properties of a-naphthylthiourea (ANTU) by Richter (1) has aroused interest in the mechanism by which this compound produces its acute toxic effects in animals. Factors associated with the toxicity of ANTU such as (a) the high toxicity to Norway rats, (b) the lower toxicity to most other species, (c) the development of tolerance after administration of s...

A series of hydrophobic task-specific ionic liquids designed to extract Hg2+ and Cd2+ from water were prepared by appending urea-, thiourea-, and thioether-substituted alkyl groups to imidazoles and combining the resulting cationic species with PF6-. The new ionic liquids were characterized and investigated for their metal ion extraction capabilities. When used in liquid/liquid extraction of Hg...

A novel adsorbent (GO-TOA) was prepared by condensation and self-assembly of graphene oxide (GO) thiourea, it characterized systematically. The results revealed that thiourea has anchored on successfully. showed GO-TOA had a higher adsorption capacity (641.724 mg/g) rate (92.32%) than GO (196.8 mg/g 65.6%), indicating the introduction greatly improved GO. Adsorption kinetics, thermodynamics iso...

Both the determination and the identification of the naturally occurring coproporphyrin isomers I and III depend upon the exactness of the data relating to their physical properties and to those of their methyl esters. Quantitative estimation of these isomers involves spectrophotometric or fluorimetric comparisons with standard solutions usually prepared from the crystalline tetramethyl ester o...