Versatile control of the optical bandgap in heterobimetallic polymers through complexation of bithiazole-containing polyplatinynes with ReCl(CO)5

Two Is Better than One? Investigating the Effect of Incorporating Re(CO)3Cl Side Chains into Pt(II) Diynes and Polyynes

“…21 An additional and promising strategy to optimise the optoelectronic properties is to incorporate a second (hetero) metal ion into the main backbone or as a side-chain. [22][23][24][25] The introduction of a second metal into a metalla-yne induces donor-acceptor interactions and influences the energy levels of the frontier orbitals 26 and hence the absorption/emission wavelength, 27 conductivity, 28 and redox behavior. 24,25 In particular, introduction of an ion such as Re(I) facilitates the movement of charges, narrows the band gap Eg and produces long-lived luminescence.…”

“…29 It is reported that Re(I)-2,2'-diimine complexes show environment-sensitive metal-to-ligand charge-transfer (MLCT) excited states, which can be exploited to develop luminescent and redox-active materials. 29 Wong and co-workers 24 found that the incorporation of Re(I) as a pendant side-chain into a bithiazole-containing poly(platina-yne) significantly modified the photophysical properties of the polymer. Such Pt(II)-Re(I) hetero-bimetallic systems are unique in allowing the effects of two different metal ions to be synergistically combined, potentially leading to new and useful physical properties.…”

Heterometal Grafted Metalla-ynes and Poly(metalla-ynes): A Review on Structure–Property Relationships and Applications

“…Like other reports, we also noted that the 5,5 -bisalkynyl systems are much better than the 6,6 -counterparts. Wong and co-workers [58] also reported that the coordination of a Re(I) unit, as well as the number of thienyl rings, plays a central role in determining the PL properties of poly(platina-yne) P17 (Figure 10, Table 3). In the past, we demonstrated that the topology of alkynylated π-conjugated ligands plays an important role in determining electron transfer and other processes [57].…”

“…Like other reports, we also noted that the 5,5′-bisalkynyl systems are much better than the 6,6′-counterparts. Wong and co-workers [58] also reported that the coordination of a Re(I) unit, as well as the number of thienyl rings, plays a central role in determining the PL properties of poly(platina-yne) P17 (Figure 10, Table 3).…”

Inorganic and organometallic polymers

“…GPC, multinuclear NMR, FT-IR, UV-Vis, CV and photoluminescence emission spectroscopy were used for characterisation where the latter showed that the bandgaps of the Pt(II) complex polymers can be controlled between the range of 2.18 to 1.85 eV by modifying the length of oligothiophene chain length (m) as well as by complexation with Re(CO) 5 . 115 A novel Ru-containing polymer (48) based on bidentate N 4 N ligands were synthesized via still cross-coupling reaction. Multinuclear NMR, UV-Vis, FT-IR, CV and TGA were used to confirm the structure.…”