In this work, iron/silica/gold core-shell nanoparticles (Fe 3 O 4 @SiO 2 @Au NPs) characterized by magnetic and optical properties have been synthetized to obtain a promising theranostic platform. In order to improve their biocompatibility, the obtained multilayer nanoparticles have been entrapped in polymeric micelles (PMs), decorated with folic acid moieties and tested in vivo for Photoacustic (PA) and MRI detection of ovarian cancer.

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Three fluorescent asymmetric bis-urea receptors (L1-L3) have been synthesised. The binding properties of L1-L3 towards different anions (fluoride, acetate, hydrogencarbonate, dihydrogen phosphate, and hydrogen pyrophosphate HPpi 3-) have been studied by means of 1 H-NMR, UVVis and fluorescence spectroscopies, single crystal X-ray diffraction, and theoretical calculations. In particular, a remarkable affinity for HPpi 3-has been observed in the case L1 (DMSO-d6/0.5%H2O) which also acts as a fluorimetric chemosensor for this anion. Interestingly, when L1 is included in cethyltrimethylammonium (CTAB) micelles, hydrogen pyrophosphate recognition can also achieved in pure water.

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