Results 181 to 190 of about 6,223 (217)

Diketopyrrolopyrrole-based carbon dots for photodynamic therapy

Nanoscale, 2018
The development of a simple and straightforward strategy to synthesize multifunctional carbon dots for photodynamic therapy (PDT) has been an emerging focus.
Haozhe He, Xiaohua Zheng, Shi Liu, Min Zheng, Zhigang Xie, Yong Wang, Meng Yu, Xintao Shuai   +7 more
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Poly(diketopyrrolopyrrole−terthiophene) for Ambipolar Logic and Photovoltaics

Journal of the American Chemical Society, 2009
A new semiconducting polymer, PDPP3T, with alternating diketopyrrolopyrrole and terthiophene units is presented. PDPP3T has a small band gap of 1.3 eV and exhibits nearly balanced hole and electron mobilities of 0.04 and 0.01 cm(2) V(-1) s(-1), respectively, in field-effect transistors (FETs).
Bijleveld, J.C., Zoombelt, A.P., Mathijssen, S.G.J., Wienk, M.M., Turbiez, M.G.R., Leeuw, de, D.M., Janssen, R.A.J.   +6 more
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Supramolecular Self-Assembly of Diketopyrrolopyrrole with Unprecedented Photoconductivity

ACS Applied Electronic Materials, 2023
The oscillation of chemical bonds in molecular semiconductors plays a key role in fragmenting the electric conducting pathways due to the large fraction of free volumes, acting as “trap sites” for charge carriers. Incorporating directional noncovalent chemical bonds between the monomeric unit in organic semiconductors is an excellent approach to ...
Nilabja Maity, Manoj Kumar Sharma, Samrat Ghosh, Mathias K. Huss-Hansen, Ahin Roy, Ravishankar Narayanan, Matti Knaapila, Wakana Matsuda, Shu Seki, Satish Patil   +9 more
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Excitation Energy Shuttling in Oligothiophene–Diketopyrrolopyrrole–Fullerene Triads

The Journal of Physical Chemistry A, 2012
The photophysical properties of a thiophene-diketopyrrolopyrrole oligomer linked to two fullerene units via alkyl linkers of different lengths have been investigated in solution. The molecules exhibit excitation energy shuttling between the singlet and triplet photoexcited states.
Karsten, B.P., Smith, P.P., Tamayo, A.B., Janssen, R.A.J.   +3 more
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A Diketopyrrolopyrrole‐Based Dimer as a Blue Pigment

Chemistry – A European Journal, 2019
Abstract1,4‐Diketopyrrolo[3,4‐c]pyrroles (DPPs) constitute a class of hydrogen‐bonded pigments covering a color range from yellow–orange to dark violet. We report facile dimerization of a Boc‐substituted 3,6‐dithienyl‐DPP. The formed dimer shows brilliantly blue color as a result of the expansion of the chromophore.
Manuela Casutt, Benedikt Dittmar, Hanna Makowska, Tomasz Marszalek, Soh Kushida, Uwe H. F. Bunz, Jan Freudenberg, Daniel Jänsch, Klaus Müllen   +8 more
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O- and N-alkylated diketopyrrolopyrrole derivatives

Tetrahedron Letters, 2011
Abstract The alkylation of 3-phenyl-6-(2-thienyl)pyrrolo[3,4- c ]pyrrole-1,4-dione with 1-bromo-2-ethylhexane was performed. Besides the expected N,N′-dialkylated product, both possible N , O -dialkyl derivatives were isolated and identified for the first time. The position of the alkyl substituents in all three dialkylated isomers was determined by
Štěpán Frebort, Zdeněk Eliáš, Antonín Lyčka, Stanislav Luňák, Jan Vyňuchal, Lubomír Kubáč, Radim Hrdina, Ladislav Burgert   +7 more
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Straightforward access to diketopyrrolopyrrole (DPP) dimers

Dyes and Pigments, 2013
Abstract Synthesis, isolation and characterization of diketopyrrolopyrrole (DPP) dimers are described. These derivatives were prepared starting from symmetric or asymmetric DPP monomers through Pd-catalyzed homocoupling, Yamamoto coupling or Suzuki coupling. The spectroscopic properties of these newly synthesized DPP dimers were investigated and were
Stas, Sara, Balandier, Jean-Yves, Lemaur, Vincent, Fenwick, Oliver, Tregnago, Giulia, Quist, Florence, Cacialli, Franco, Cornil, Jérôme, Geerts, Yves   +8 more
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Synthesis of novel diketopyrrolopyrrole-based dyes

Monatshefte für Chemie - Chemical Monthly, 2018
Three novel diketopyrrolopyrrole-based molecules for potential application in dye-sensitized solar cells are synthesized starting from a common and easily available key intermediate with a bis-thienyl diketopyrrolopyrrole structure. The synthetic sequence is based upon transition-metal catalyzed coupling reactions involving commercial boronic acid ...
Punzi, Angela, Zappimbulso, Nicola, Farinola, Gianluca M.   +2 more
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Near-infrared absorbing tetracyanobutadiene-bridged diketopyrrolopyrroles

New Journal of Chemistry, 2018
Herein we have synthesized near-infra red absorbing TCBD bridged diketopyrrolopyrroles by a [2+2] cycloaddition–retroelectrocyclization reaction in order to see the effects of end capping donors and electron-withdrawing TCBD on the optical and electrochemical properties.
Yuvraj Patil, Charu Popli, Rajneesh Misra   +2 more
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Tunable Emission from Triplet Fusion Upconversion in Diketopyrrolopyrroles

Journal of the American Chemical Society, 2019
Optical upconversion based on triplet fusion (TF), also known as triplet-triplet annihilation, is a process by which two or more low-energy photons are converted to one higher energy photon. This process requires two components, a sensitizer which absorbs the incident low-energy photons and an annihilator which emits the higher energy photons.
Andrew B. Pun, Luis M. Campos, Daniel N. Congreve   +2 more
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