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Themed collection Celebrating Prof. Fred Wudl’s 80th Birthday

26 items
Editorial

Fred Wudl. A giant in π-conjugated materials

Qichun Zhang, Dmitrii F. Perepichka, Hong Meng and Yongsheng Chen introduce the Materials Chemistry Frontiers themed issue celebrating Professor Fred Wudl's 80th birthday.

Graphical abstract: Fred Wudl. A giant in π-conjugated materials
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Review Article

Multiscale engineering of functional organic polymer interfaces for neuronal stimulation and recording

This review summarizes recent progress on chemistry and engineering techniques of organic polymers across a range of electrically insulating polymers, semiconducting polymers and conducting polymers for neural interfacing, stimulation and recording.

Graphical abstract: Multiscale engineering of functional organic polymer interfaces for neuronal stimulation and recording
Review Article

Two dimensional semiconducting polymers

Synthetic chemistry towards two-dimensional semiconducting polymers (2DSPs) with planar π-conjugated structures is reviewed and their unique chemical and physical properties derived from the extended π-conjugation are discussed.

Graphical abstract: Two dimensional semiconducting polymers
Review Article

Recent advances of stable Blatter radicals: synthesis, properties and applications

Radicals, organic molecules with unpaired electrons, are applied across different scientific disciplines such as electronics, energy storage and biochemistry.

Graphical abstract: Recent advances of stable Blatter radicals: synthesis, properties and applications
Review Article

Recent advances in high-performance organic solar cells enabled by acceptor–donor–acceptor–donor–acceptor (A–DA′D–A) type acceptors

In this review, we focus on the recent advances in organic solar cells enabled by A–DA′D–A type acceptors and summarize the correlation between molecular structure, molecular packings, optoelectronic properties, and photovoltaic performance.

Graphical abstract: Recent advances in high-performance organic solar cells enabled by acceptor–donor–acceptor–donor–acceptor (A–DA′D–A) type acceptors
Review Article

Structured and functionalized organic semiconductors for chemical and biological sensors based on organic field effect transistors

This review gives an overview of strategies to tailor organic semiconductors with designed physical structures and chemical functionalities for development of chemical and biological sensors based on organic field effect transistors.

Graphical abstract: Structured and functionalized organic semiconductors for chemical and biological sensors based on organic field effect transistors
Review Article

Two-dimensional halide perovskites featuring semiconducting organic building blocks

A timely review of recent exciting progress is provided regarding the molecular design, optical characterization, and device fabrications of novel 2D halide perovskite materials incorporating functional organic semiconducting building blocks.

Graphical abstract: Two-dimensional halide perovskites featuring semiconducting organic building blocks
Review Article

Recent progress in well-defined higher azaacenes (n ≥ 6): synthesis, molecular packing, and applications

In this review, we will focus on the recent progress in the synthetic strategies, photo-electronic properties, molecular packing modes and applications of azaacenes (n ≥ 6) with single-crystal structures.

Graphical abstract: Recent progress in well-defined higher azaacenes (n ≥ 6): synthesis, molecular packing, and applications
Open Access Research Article

Cyclobutene based macrocycles

Nanoscopic macrocycles could have unusual magnetic, optical, and electronic properties when compared to their linear counterparts.

Graphical abstract: Cyclobutene based macrocycles
Open Access Research Article

Purity of organic semiconductors as a key factor for the performance of organic electronic devices

Effects of purification were studied in organic field effect transistors. The results presented here indicate that the purity of organic semiconductors is a key parameter to achieve high performance for the field of organic field effect transistors.

Graphical abstract: Purity of organic semiconductors as a key factor for the performance of organic electronic devices
Research Article

Pressure-induced valence transition in the mixed-valence (Sm1/3Ca2/3)2.75C60 fulleride

The mixed-valence (Sm1/3Ca2/3)2.75C60 fulleride undergoes an abrupt strongly hysteretic reversible phase transition accompanied by a drastic increase in the bulk Sm valence by ∼20% to +2.71 through the application of external pressure.

Graphical abstract: Pressure-induced valence transition in the mixed-valence (Sm1/3Ca2/3)2.75C60 fulleride
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Band gap engineering of donor–acceptor co-crystals by complementary two-point hydrogen bonding

Hydrogen bonding of diindolopyrrole donors with quinone acceptors enhances the orbital interactions and modulates the band gap and electrical properties of their complexes.

Graphical abstract: Band gap engineering of donor–acceptor co-crystals by complementary two-point hydrogen bonding
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Pendant conjugated molecules based on a heterogeneous core structure with enhanced morphological and emissive properties for organic semiconductor lasing

A set of oligofluorene-type pendant conjugated molecules based on heterogeneous core structures (C1 and C2) with enhanced morphological and emissive properties have been synthesized and explored as gain media for organic semiconductor lasers.

Graphical abstract: Pendant conjugated molecules based on a heterogeneous core structure with enhanced morphological and emissive properties for organic semiconductor lasing
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Ultrafast photoinduced electron transfer in conjugated polyelectrolyte–acceptor ion pair complexes

Conjugated polyelectrolytes (CPEs) are a promising class of materials for photovoltaic and sensing applications due to their ability to undergo efficient photoinduced electron transfer (ET).

Graphical abstract: Ultrafast photoinduced electron transfer in conjugated polyelectrolyte–acceptor ion pair complexes
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Synthesis and excited state processes of arrays containing amine-rich carbon dots and unsymmetrical rylene diimides

This work reports on the preparation of carbon dots (CDs) and rylene diimide hybrids and their spectroscopic investigation reveals complex inter-chromophoric interactions.

Graphical abstract: Synthesis and excited state processes of arrays containing amine-rich carbon dots and unsymmetrical rylene diimides
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Doping molecular organic semiconductors by diffusion from the vapor phase

Spiro-OMeTAD can be doped by infiltration of F4TCNQ from the vapor phase without causing crystallization. Optical spectroscopy and thermopower measurements examined the question of the formation of dication states by charge transfer doping.

Graphical abstract: Doping molecular organic semiconductors by diffusion from the vapor phase
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Electronic, vibrational, and charge-transport properties of benzothienobenzothiophene–TCNQ co-crystals

The electronic, optical, vibrational, and charge-transport properties of a series of benzothienobenzothiophene–TCNQ co-crystals are discussed on the basis of density functional theory calculations.

Graphical abstract: Electronic, vibrational, and charge-transport properties of benzothienobenzothiophene–TCNQ co-crystals
From the themed collection: Celebrating our 2021 Prizewinners
Open Access Research Article

Exploiting trifluoromethyl substituents for tuning orbital character of singlet and triplet states to increase the rate of thermally activated delayed fluorescence

This work shows that trifluoromethyl (CF3) substituents can be used to increase the rate of thermally activated delayed fluorescence (TADF) in conjugated organic molecules by tuning the excitonic character of the singlet and triplet excited states.

Graphical abstract: Exploiting trifluoromethyl substituents for tuning orbital character of singlet and triplet states to increase the rate of thermally activated delayed fluorescence
Research Article

A new family of liquid and solid guanidine-based n-type dopants for solution-processed perovskite solar cells

A new family of n-type dopants for organic semiconductors is reported. Changing the alkyl chain of these triazabicyclodecene (TBD) dopants alters their physical properties, including thermal stability, and influences their doping efficiency.

Graphical abstract: A new family of liquid and solid guanidine-based n-type dopants for solution-processed perovskite solar cells
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

An oxygen heterocycle-fused fluorene based non-fullerene acceptor for high efficiency organic solar cells

A new acceptor–donor–acceptor (A–D–A) small molecule acceptor, named FCO-2F, is designed and synthesized based on the previous acceptor F-H.

Graphical abstract: An oxygen heterocycle-fused fluorene based non-fullerene acceptor for high efficiency organic solar cells
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Open Access Research Article

Protonic acid doping of low band-gap conjugated polyions

Conjugated polyions (CPIs) offer synthetic tunability and selective processing into insulating, semiconducting and metallic states simply by controlling acidity.

Graphical abstract: Protonic acid doping of low band-gap conjugated polyions
Research Article

Fluoro-alkyl substituted isothianaphthene bisimides as stable n-type semiconductors

Two fluoro-alkyl substituted isothianaphthene bisimide materials with high solubility and their applications in stable n-type OTFTs are demonstrated.

Graphical abstract: Fluoro-alkyl substituted isothianaphthene bisimides as stable n-type semiconductors
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Understanding of copolymers containing pyridine and selenophene simultaneously and their polarity conversion in transistors

Two n-type pyridine and selenophene-containing polymers were synthesized and the structure–property relationships were investigated, followed by polarity switching from ambipolarity to unipolar characteristics via the doping method.

Graphical abstract: Understanding of copolymers containing pyridine and selenophene simultaneously and their polarity conversion in transistors
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

The importance of sulfonate to the self-doping mechanism of the water-soluble conjugated polyelectrolyte PCPDTBT-SO3K

In-depth understanding of the doped and de-doped states of CPE-K, a unique, water-soluble, highly conductive polymer.

Graphical abstract: The importance of sulfonate to the self-doping mechanism of the water-soluble conjugated polyelectrolyte PCPDTBT-SO3K
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Anthracene derivative based multifunctional liquid crystal materials for optoelectronic devices

A liquid crystal molecule with versatile properties, like the indicators of a clock, shows various applications.

Graphical abstract: Anthracene derivative based multifunctional liquid crystal materials for optoelectronic devices
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
Research Article

Perylene monoimide and naphthalene-annulated [3,3,3]propellanes: synthesis and device applications

3D polycyclic aromatic hydrocarbons are synthesized, and their applications for organic field-effect transistors and organic light-emitting diodes are explored.

Graphical abstract: Perylene monoimide and naphthalene-annulated [3,3,3]propellanes: synthesis and device applications
From the themed collection: Celebrating Prof. Fred Wudl’s 80th Birthday
26 items

About this collection

Welcome to Materials Chemistry Frontiers special collection celebrating Prof. Fred Wudl’s 80th Birthday.

Professor Fred Wudl is one of the pioneers of the modern organic materials chemistry, and has made a great contribution and achieved several milestones for this area, including the pioneering works of organic conductors for TCNQ/TTF, OPV’s PCBM etc. Contributed by Professor Wudl’s former co-workers and friends, this special collection covers all aspects of organic semiconductors including synthesis and theoretical investigation as well as their properties or applications related to display technologies, optical materials, magnetics and electronics.

Guest Editors: Qichun Zhang (Nanyang Technical University), Dmitrii Perepichka (McGill University), Hong Meng (Peking University, Shenzhen Graduate School) and Yongsheng Chen (Nankai University)

More articles will be added as soon as they are published.

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