Synthesis and characterization of new polymeric phthalocyanines substituted with diaza-18-crown-6 macrocycles through ethyleneoxy bridges

Octa-armed star-shaped poly(ε-caprolactone)s with a phthalocyanine core by ring-opening polymerization: Synthesis and characterization

“…When methanol was added to a solution of 7 in DMF, the intensities of the Q-bands slightly decreased without any shift, which is in contrast to the general estimation of aggregation phenomena by the addition of a polar solvent. This behaviour can be attributed to the dilution effect [48,52] (Fig.6a). Next, AgNO 3 in methanol was added to the solution of 7 in DMF (4.87 × 10 −5 M).…”

“…We have previously outlined a concept for the synthesis of new types of polymeric phthalocyanines bearing peripherally mixed sulphur-and oxygen-donor moieties [45], mixed nitrogen-and oxygen-donor moieties [46], only sulphur linkage moieties [47], lariat ether [48,49], an α-methylferrocenylmethoxy unit [50], and peripherally tetra-and octa-substituted hydroxyl-functionalised monomeric phthalocyanines [51,52]. To the best to our knowledge, there are no studies reported on the synthesis of star-shaped PCL, which is peripherally linked to a phthalocyanine core by the ROP, except for the study of Ng et al, in which PCL chains are axially linked to silicon(IV) phthalocyanine dihydroxide [36].…”

A new polymeric phthalocyanine containing 16-membered tetrathia macrocyclic moieties by microwave irradiation: Synthesis and characterization

“…The molecular weights of the polymers could not be determined using traditional methods owing to their poor solubility in organic solvents, but also by comparison of the IR absorption bands of the end groups with those of the bridging groups [10,[32][33][34][35][36].…”

Metallathiacrown Ethers: Synthesis and Characterization of Transition-Metal Complexes Containing α,ω-Bis(phosphite)-Polythioether Ligands and an Evaluation of Their Soft Metal Binding Capabilities

“…Removal of the solvent in vacuo and recrystallization of the crude product from DCM/hexanes yielded 0.431 g (65.4%) of analytically pure 2 as colorless crystals. 31 (5). Two solutions, the first consisting of 0.0900 g (0.290 mmol) of cis-Mo(CO) 4 (nbd) and the second consisting of 0.190 g (0.280 mmol) of L3, dissolved in dry DCM were simultaneously added dropwise to a small amount of the stirred solvent.…”

“…Due to their excellent selectivities for binding small molecules and metal cations, crown ethers have been studied for many years by both organic and inorganic chemists alike. − Modification of the crown ether ring with various functional groups has been used to provide additional donor sites, increase selectivity for specific substrates, or add a spectroscopic probe. − The heteroatom donor sites in these compounds have also been varied to enhance selectivities for specific classes of metal cations and metal-containing small molecules. For instance, hard metals such as the alkali metals show an increased selectivity for hard donor atoms such as oxygen (crown ether) and nitrogen (azacrown ether), , whereas metals such as those found in the fifth and sixth rows of the periodic table more strongly bind to soft donor atoms such as sulfur (thiacrown ether). − Due to their soft donor capability, thiacrown ethers, in particular, have found a wide variety of applications from toxic heavy metal sensing and removal agents to nanomaterials and anticancer agents. − …”