Dielectric relaxation and hydrogen bonding studies of 1,3-propanediol–dioxane mixtures using time domain reflectometry technique

Correlating the Phase Behavior with the Device Performance in Binary Poly-3-hexylthiophene: Nonfullerene Acceptor Blend Using Optical Probes of the Microstructure

“…The results of the analysis using a binary model including P3HT and NFA, are shown in Figure 7 the extent of mixing and molecular interaction in the binary. 40 Note that the volume fraction was determined by fitting the ellipsometric data and to calculate the inferred weight fraction we use the densities of P3HT and NFAs, taken as 1.1 gr/cm 3 for P3HT according to Prosa et al 41 and 1.314 gr/cm 3 and 1.244 gr/cm 3 for O-IDFBR, and O-IDTBR and EH-IDTBR respectively. The deviation between the inferred and actual NFA wt% can be assigned, to some extent, to the miscibility of the NFAs within the P3HT semi-crystalline matrix, which would contribute to a third mixed blend phase that is not included as a constituent in the standard (i.e.…”

“…However, the wt % of both O-IDTBR and EH-IDTBR is slightly underestimated beyond 40 wt % and more significantly beyond 70 wt % O-IDTBR and EH-IDTBR. Deviation from the direct proportionality line indicates the extent of mixing and molecular interaction in the binary . Note that the volume fraction was determined by fitting the ellipsometric data and to calculate the inferred weight fraction, we use the densities of P3HT and NFAs, taken as 1.1 gr/cm 3 for P3HT according to Prosa et al and 1.314 and 1.244 gr/cm 3 for O-IDFBR and for O-IDTBR and EH-IDTBR, respectively.…”

Time Domain Reflectometric Studies on Methylcellosolve – Acetylacetone Binary Solutions

“…Therefore, usage of mole fraction instead of volume fraction qualitatively causes no difference in the information regarding the heteromolecular interactions that are present in the binary solutions at different concentrations. According to most of the literature reports 23,25,[34][35][36][37] , the positive deviation of e E from ideal values is due to the formation of H-bonded structures with increased number of parallel aligned dipoles and the negative deviation is the result of the presence of heteromolecular interactions with a decrease in the number of parallel oriented dipoles. But our earlier research work 38 has confirmed that the interpretation of positive/negative e E values as the sign of increase/ decrease of the number of dipoles is incorrect if the binary solutions consist of associative molecules.…”

Study of Dielectric Properties of Aqueous Solution of Nicotinic Acid Using Time Domain Technique

“…[10] Where p()and q() are The complex permittivity spectrum of the Nicotinic acid mixtures solution is an asymmetric shape and it is determined by the Harviliak -Negami (HN) equation [11]. The complex dielectric permittivity data were fitted to HN model using non -linear least square fit method in order to extract dielectric relaxation time with the following expression [6,11].…”