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opencc-by-4.0Jun 2024View details →

LC-MS analysis raw data of DTX3L-mediated enzymatic conjugation of ubiquitin with various nucleotide substrates

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opencc-by-4.0Jul 2018View details →

Organic Light-Emitting Transistors with Simultaneous Enhancement of Optical Power and External Quantum Efficiency via Conjugated Polar Polymer Interlayers

<p>Organic light-emitting transistors (OLETs) show the fascinating combination of electrical switching characteristics and light generation capability. However, to ensure an effective device operation, an efficient injection of charges into the emissive layer is required. The introduction of solution-processed conjugated polyelectrolyte (CPE) films at the emissive layer/electrode interface represents a promising strategy to improve the electron injection process by dipole formation. However, their use in optoelectronic devices also involves some limitations because of the ionic nature of CPEs. In this context, neutral conjugated polar polymers (CPPs) represent a valid alternative to CPEs because the conjugated backbones of CPPs are functionalized with polar nonionic side groups, thus avoiding ion-dependent drawbacks. By introducing a layer of polyfluorene-containing phosphonate groups underneath the metal electrodes, we here demonstrate a substantial improvement of the electron injection properties into the OLET-emissive layer and, accordingly, a more than 2-fold increased light power and a 5 times higher external quantum efficiency of p-type OLETs in comparison with reference devices without any interlayer. The great benefit of using a transparent glass substrate allowed to selectively investigate the morphological and photoluminescent characteristics of both CPE- and CPP-buried interlayers within complete OLETs by means of an optical scanning probe technique. This, together with a thorough optoelectronic characterization of the figures of merit of working light-emitting devices, allowed to disclose the origin of the improved optical performance of CPP-based devices as well as the operation mechanisms of the investigated interlayer in the corresponding OLETs.</p>

Fig. 1 in Unique guanidine-conjugated catechins from the leaves of Alchornea rugosa and their autophagy modulating activity

Fig. 1. Chemical structures of 1–9 from the leaves of A. rugosa.

Fig. 3 in Unique guanidine-conjugated catechins from the leaves of Alchornea rugosa and their autophagy modulating activity

Fig. 3. Key NOESY correlations for sugar moieties of compounds 1–3 and 7.

Fig. 8 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 8. Experimental and calculated ECD spectra of 3.

Fig. 7 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 7. COSY, key HMBCs, and key NOEs of 3.

Fig. 2 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 2. COSY, key HMBCs, and key NOEs of 1 and 2

Fig. 3 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 3. Experimental ECD spectrum of 4 and calculated ECD spectra of 3R,6S,7S-4 and its 7-epimer.

Fig. 1 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 1. Chemical structures of 1–6

Fig. 5 in Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity

Fig. 5. COSY, key HMBCs, and key NOEs of 1a, 2a, 1b, and 2b.

opennotspecifiedAug 2021View details →

Fig. 1 in Bioactive α,β-conjugated 3-keto-steroids from the Australian brown alga Cystophora xiphocarpa

Fig. 1. Previously isolated bioactive α,β-conjugated 3-keto-steroids.

opennotspecifiedAug 2021View details →

Fig. 4 in Bioactive α,β-conjugated 3-keto-steroids from the Australian brown alga Cystophora xiphocarpa

Fig. 4. Key NOESY correlations observed for the carbonate derivative of 14, compound 16.

Fig. 8 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 8. ΔδH(S-R) value of MTPA esters of 6 in CDCl3.

Fig. 5 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 5. Experimental Mo2(OCOCH3)4-induced ECD spectrum of 4 in DMSO.

Fig. 4 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 4. Experimental ECD spectra of mangnardones A D (1–4) in MeOH.

Fig. 1 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 1. Chemical structures of compounds 1–18.

Fig. 7 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 7. Experimental ECD spectra of mangnardones F–H (6–9) in MeOH.

Fig. 3 in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 3. Key NOESY correlations of compounds 1, 3, 6, and 9.

Fig. 2. Key 1H–1H in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 2. Key 1H–1H COSY and HMBC correlations of compounds 1, 3, 6, and 9.

Fig. 9. X in Terpene Shikimate conjugated meroterpenoids from the endophytic fungus Guignardia mangiferae

Fig. 9. X-ray ORTEP drawing of 9.