European Journal of Molecular & Clinical Medicine

Fluorescent carbon dots (CDs) are an emerging category of nanomaterials in the carbon family. There are different inexpensive and renewable resources that can be used to synthesize green CDs, which include received immense consideration from researchers because of their improved aqueous solubility, high biocompatibility, and eco-friendly nature compared with chemically derived CDs. Additional surface passivation is not necessary as heteroatoms be present on the surface of green CDs in the form of amine, hydroxyl, carboxyl, or thiol functional groups, which be able to improve their physicochemical properties, quantum yield, and the probability of visible light absorption. Green CDs boast potential applications in the fields of bioimaging, drug/gene delivery systems, catalysis, and sensing. While their discovery, there have been several review articles that describe the synthesis of green CDs and some of their applications. Nevertheless, there are no review articles describing the synthesis and complete applications of green CDs. Here, we provide detailed information concerning their synthesis and applications based on the available literature. In addition, we discuss a number of the less explored applications of green CDs and the challenges that continue to be overcome.

"Green sustainable chemistry" uses chemical technology to make less harmful things and procedures for our planet's ecosystems (GSC). Green chemistry uses eco-friendly, high-efficiency synthetic techniques to make life-saving drugs. This decreases medication development's environmental effect and speeds guide optimization. HPAs have various economic and environmental benefits as catalysts. The large range of reaction domains in which heteropolyacid catalysts can be utilised as acids is examined. SPNPs are an efficient, cost-effective, and eco-friendly catalyst (H14[NaP5W30O110]/SiO2). This method has high yields, easy operation, and an uncomplicated product-working procedure. SPNPs (H14[NaP5W30O110]/SiO2) offer hydrolytic and thermal stability. Preyssler's anion is non-toxic and reusable.

Schiff base and its metal complexes have been synthesized by both Conventional Thermal Irradiation Technique (CTIT) as well as Micro Wave Thermal Irradiation Technique (MWTIT). later technique was found to be simple, quick, green, synthetic, pollution free and economically viable as compare to traditional one. This new green protocol involves one pot approach. Schiff base is prepared from the condensation of Anthranilic acid and Salicylaldehyde but in microwave assisted condensation in the absence of solvent is found a more efficient process to form a potentially tridentate Schiff base in solid state. This compound is versatile in forming well-defined complexes with transition metal (II) chloride. Schiff base ligand and its metal complexes have been characterized using various physicochemical techniques viz; elemental analysis, molecular weight determination, IR,¹HNMR, magnetic susceptibility measurement, molar conductance and ESR analysis. The analytical and spectral data showed that ligand acts as neutral tridentate with ONO donor sequence towards the transition metal(II) ions forming complexes of type [MLX_n] where M =Mn(II),Fe(II),Co(II),Ni(II),Cu(II), Zn(II),Cd(II) and Hg(II),L=C₁₄H₉NO₃,X= H₂O and n =2-3.The complexes possessed 1:1 metal-ligand ratio. ESR studies of Mn (II) complex explored the square pyramidal shape whereas other exist in octahedral and tetrahedral crystalline form.