Synthesis and properties of air-stable n-channel semiconductors based on MEH-PPV derivatives containing benzo[c]cinnoline moieties

Abstract

An OFET based on P50 exhibited air-stable n-channel behavior with an electron mobility of 7.8 × 10−3 cm2 V−1 s−1 under ambient conditions without annealing.

Microwave assisted one-pot green synthesis of cinnoline derivatives inside natural sporopollenin microcapsules

“…Combined with their enormous applications, the optical properties of heterocycles, particularly cinnolines, received considerable interests. 31,[48][49][50] The solid cinnoline 3 collected from the ltrate aer the MW synthesis reaction was green in colour and showed uorescence properties as revealed from CLSM analysis discussed above. Fig.…”

Revealing weak spin-orbit coupling effects on charge carriers in a π -conjugated polymer

“…The computed molecular orbitals (MOs) of the electron (LUMO) and hole (HOMO) based on the optimized structures are shown in Fig. 1(b,c) 38 . DFT calculations further yield electronic g-tensors for both model systems at the TPSSh/IGLO-III/TPSSh-D3(BJ)/def2-TZVP 39 level of theory provided by the ORCA program package 40 .…”

Phenylenevinylene Systems: The Oligomer Approach

“…These analogous polymers, according to several reports, demonstrated to maintain the same optoelectronic properties of the oligomer previously synthetized. This homogeneity of the properties between oligomer and its polymer analogue is more evident when the target polymer is a segmented structure (Figure 2) instead of a fully conjugated polymer (e.g., MEH-PPV in Figure 1) [4,15,29], since the optoelectronically active segment in the segmented polymer can be truly reproduced in the oligomer (Figure 2). In segmented conjugated polymers, the chain tensions that cause torsions on the polymer backbone are suffered and assumed by the flexible aliphatic segments.…”

“…The impressive electroluminescence exhibited by this polymer in a diode with a very simple architecture [Al/PPV/ITO, where aluminium (Al) and indium tin oxide (ITO) act as electrodes] turned polymer electronics from an area of pure academic interest to a very promising technological area [2]. A few years later, the first solar cell based on MEH-PPV and C61-phenyl butyric acid methyl ester (PCBM) was reported [3][4][5]. Also in the 1990s, the first conjugated polyelectrolyte based on a sulfonated PPV was developed and it proved to be a highly sensitive fluorescent sensor [6].…”

“…In this way, their properties are located in the middle of these two polymers; thus, they are more chemically stable than the PA, while are not as robust as the PPP. Furthermore, while the PA is black and has a smaller band gap (E g = 1.4 eV), PPV films without substituents are yellow due to absorption around 420 nm and with a band gap significantly higher (E g ≥ 1.9 eV) [3][4][5]. Additionally, the optical properties of PPVs can be influenced by conformational factors.…”