Blue Electrofluorescence Properties of Furan–Silole Ladder Pi-Conjugated Systems

Abstract

Abstract:A synthetic route to novel benzofuran fused silole derivatives is described and the new compounds were fully characterized. These compounds showed optical and electrochemical properties that differ from their benzothiophene analog. Preliminary results show that these derivatives can be used as blue emitters in organic light emitting devices (OLEDs) illustrating the potential of these new compounds for opto-electronic applications.

Phosphanyl‐Substituted Siloles: Synthesis, Optical and Electrochemical Studies and Computations

“…The 2 J P,Si coupling constants in compounds 1-5 are in the range of 3 J P,Si values reported for β-silyl phospholes (2-20 Hz). [29,30] 1 H and 13 C NMR resonances are observed in the typical regions reported for similar compounds. [23,24,31]…”

“…tems, allowing for semiconductor application in electronic devices, such as organic light-emitting diodes (OLEDs), organic fieldeffect transistors (OFETs) or photovoltaic devices. [4][5][6][7][8][9][10] Even more interestingly, phenyl-substituted siloles may show aggregation-induced emission (AIE) enabling the synthesis of efficient emitters for OLEDs [11][12][13] or biosensors [14] exhibiting significantly stronger fluorescence in the solid-state than in solution. The optical properties of these molecules can be fine-tuned, for example, by changing the nature of the substituents at the fivemembered ring.…”

“…H NMR (300.1 MHz, CDCl 3 ): δ = 0.90 (s, 6H, SiCH 3 ); 1.01 (dd,3 J H,P = 17.7 Hz,3 J H,H = 6.6 Hz, 24H, CHCH 3 ); 1.12 (dd,3 J H,P = 17.7 Hz,3 J H,H = 6.9 Hz, 12H, CHCH 3 ); 1.69 (m, 4H, CH); 6.8-7.2 (m, 10H, ArH) 13. C{ 1 H} NMR (75.5 MHz, CDCl 3 ): δ = 0.5; 17.1; 18.6; 30.3 (d, 1 J C,P = 47.1 Hz); 127.7;127.7; 127.8; 138.9 (d, J C,P = 6.2 Hz); 143.6 (dd, 1 J C.P = 49.0 Hz, 3 J C,P = 1.9 Hz); 161.4 (dd, 2 J C,P = 19.2 Hz, 3 J C,P = 1.2 Hz) 29.…”

Si-containing polycyclic aromatic hydrocarbons: synthesis and opto-electronic properties

“…S16). 19 Moreover, one notices in Fig. S16 that the central carbon atoms are not involved in the transition in 2, contrary to 3 and 4.…”

Si-doped Polycyclic Aromatic Hydrocarbons: Synthesis and Opto-electronic Properties

“…S16). 22 Moreover, one notices in Fig. S16 that the central carbon atoms are not involved in the transition in 2, contrary to 3 and 4.…”