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1. N -Vinyl and N -Aryl Hydroxypyridinium Ions: Charge-Activated Catalysts with Electron-Withdrawing Groups

   https://doi.org/10.1021/acs.joc.0c00498  

   Riegel, George F.; Kass, Steven R. (May 2020, The Journal of Organic Chemistry)
2. Investigating charge transport in a p -Si/ n -poly(benzimidazobenzophenanthroline)-BBL thin film heterojunction diode

   https://doi.org/10.1088/1361-648X/adcdb0  

   Cruz-Arzon, Alejandro J; Pinto, Nicholas J (April 2025, Journal of Physics: Condensed Matter)

   Abstract The physics of charge transport across the interface in an inorganic Si/organic conducting polymer junction diode has received little attention compared to the inorganicp–nsilicon diode. One reason is the amorphous nature of the organic polymer and the polymer chain orientation which introduces disorder and barriers to charge flow. Herein we first present an easy technique to fabricate an inorganic/organic,p-Si/n-poly(benzimidazobenzophenanthroline-BBL) junction diode. The physics of charge transport across the heterojunction, and in the BBL film is then analyzed from the device current-voltage characteristics as a function of temperature in the range 150 K <T< 370 K. The temperature dependence of the diode ideality parameter and of the saturation current density demonstrate that tunneling enhanced charge recombination via exponential trap distributions in the depletion region was responsible for charge transport across the junction. Furthermore, the temperature dependence of the diode conductance revealed that thermal activation and hopping both contributed to charge transport in the BBL film away from the junction. BBL is a ladder polymer with a discrete layered crystal structure that is oriented perpendicular to the substrate. Such polymer chain orientation, combined with a distribution of bond lengths and numerous conjugation paths available for charge delocalization result in the multiple charge transport mechanisms as observed in the diode. 

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3. Preparation and Characterization of N , N′ ‐Dialkyl‐1,3‐propanedialdiminium Chlorides, N , N′ ‐Dialkyl‐1,3‐propanedialdimines, and Lithium N , N′ ‐Dialkyl‐1,3‐propanedialdiminates

   https://doi.org/10.1002/hlca.202200152  

   Schmit, Claire E.; Girolami, Gregory S. (May 2023, Helvetica Chimica Acta)

   Abstract We describe convenient preparations ofN,N′‐dialkyl‐1,3‐propanedialdiminium chlorides,N,N′‐dialkyl‐1,3‐propanedialdimines, and lithiumN,N′‐dialkyl‐1,3‐propanedialdiminates in which the alkyl groups are methyl, ethyl, isopropyl, ortert‐butyl. For the dialdiminium salts, the N₂C₃backbone is always in thetrans‐s‐transconfiguration. Three isomers are present in solution except for thetert‐butyl compound, for which only two isomers are present; increasing the steric bulk of theN‐alkyl substituents shifts the equilibrium away from the (Z,Z) isomer in favor of the (E,Z), and (E,E) isomers. For the neutral dialdimines, crystal structures show that the methyl and isopropyl compounds adopt the (E,Z) form, whereas thetert‐butyl compound is in the (E,E) form. In aprotic solvents all four dialdimines (as well as the lithium dialdiminate salts) adoptcis‐s‐cisconformations in which there presumably is either an intramolecular hydrogen bond (or a lithium cation) between the two nitrogen atoms. 

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4. Contrasting the Charge Carrier Mobility of Isotactic, Syndiotactic, and Atactic Poly(( N -carbazolylethylthio)propyl methacrylate)

   https://doi.org/10.1021/acsmacrolett.1c00622  

   Samal, Sanket; Schmitt, Alexander; Thompson, Barry C. (December 2021, ACS Macro Letters)
5. Tuning N , N -Diarylanilinosquaraine Crystal Packing: n -Hexylaryl and Fluoroaryl Substitution

   https://doi.org/10.1021/acs.cgd.8b01621  

   Schlueter, John A.; Homnick, Paul J.; Della Pelle, Andrea M.; Lahti, Paul M.; Thayumanavan, S. (May 2019, Crystal Growth & Design)