Major Natural Vegetation in Coastal and Marine Wetlands: Edible Seaweeds

For thousands of years, seaweeds grown in coastal and marine have been used as food, materials and medicines by the people. Edible seaweeds directly consumed, especially in Asian, are used for preparing food due to the their components containing minerals, essential trace elements, and various natural compounds. At the last decades, they have been getting more and more attention in food and pharmaceutical industries because of their biological activities such as anti-cancer, anti-obesity, anti-diabetes, anti-microbial, and anti-oxidant activity. Therefore, in the present study, we have worked on to understand the structure of edible seaweeds. It is worthy to mention that they can be considered as source of some proteins, polyunsaturated fatty acids, minerals, vitamins, dietary fibers, antioxidants, and phytochemicals

Re(CO)₃ Metallopolymers with Complete Metal Monomer Incorporation: Synthetic, Spectroscopic, Electrochemical, and Computational Studies

A series of main chain organometallic polymers (MCOPs) containing Re­(CO)₃Cl­(diimine) cores were synthesized. Three different types of polymerization reactions, including Yamamoto coupling, Heck coupling, and a new metal-mediated Schiff base formation/condensation reaction, allowed for the formation of metal polymers with 100% metal complex incorporation and average molecular weights (<i>M</i>_n) ranging from 25 to 850 kDa. Absorption spectroscopy, electrochemistry, and microscopy studies revealed that the type of polymerization effectively governs the physical and chemical properties of the target polymers. The electronic structures of monomeric and dimeric building units of these polymers backbones were probed by DFT and TDDFT computational methods. DFT calculations and electrochemical studies indicate that in all polymers the oxidation and reduction processes take place on Re­(I) metal centers and polymer backbones, respectively. Incorporation of metal as an electron donor (D) and organic conjugated backbone as an electron acceptor (A) provides the D–A architecture