Abstract:
:The formation of two triplet excitons at the cost of one photon via singlet exciton fission in organic semiconductors can potentially enhance the photocurrent in photovoltaic devices. However, the role of spin density distribution in driving this photophysical process has been unclear until now. Here we present the significance of electronic spin density distribution in facilitating efficient intramolecular singlet exciton fission (iSEF) in π-bridged pentacene dimers. We synthetically modulate the spin density distribution in a series of pentacene dimers using phenyl-, thienyl- and selenyl- flanked diketopyrrolopyrrole (DPP) derivatives as π-bridges. Using femtosecond transient absorption spectroscopy, we find that efficient iSEF is only observed for the phenyl-derivative in ~2.4 ps while absent in the other two dimers. Electronic structure calculations reveal that phenyl-DPP bridge localizes α- and β-spin densities on distinct terminal pentacenes. Upon photoexcitation, a spin exchange mechanism enables iSEF from a singlet state which has an innate triplet pair character.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Krishnapriya KC,Roy P,Puttaraju B,Salzner U,Musser AJ,Jain M,Dasgupta J,Patil Sdoi
10.1038/s41467-018-07736-3subject
Has Abstractpub_date
2019-01-03 00:00:00pages
33issue
1issn
2041-1723pii
10.1038/s41467-018-07736-3journal_volume
10pub_type
杂志文章abstract::An amendment to this paper has been published and can be accessed via a link at the top of the paper. ...
journal_title:Nature communications
pub_type: 已发布勘误
doi:10.1038/s41467-019-13715-z
更新日期:2019-12-06 00:00:00
abstract::Supercooling of aqueous solutions is a fundamentally and practically important physical phenomenon with numerous applications in biopreservation and beyond. Under normal conditions, heterogeneous nucleation mechanisms critically prohibit the simultaneous long-term (> 1 week), large volume (> 1 ml), and low temperature...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-05636-0
更新日期:2018-08-10 00:00:00
abstract::A crumpled sheet of paper displays an intricate pattern of creases and point-like singular structures, termed d-cones. It is typically assumed that elongated creases form when ridges connecting two d-cones fold beyond the material yielding threshold, and scarring is thus a by-product of the folding dynamics that seek ...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms8232
更新日期:2015-06-11 00:00:00
abstract::The high Aβ42/Aβ40 production ratio is a hallmark of familial Alzheimer's disease, which can be caused by mutations in the amyloid precursor protein (APP). The C-terminus of Aβ is generated by γ-secretase cleavage within the transmembrane domain of APP (APPTM), a process that is primed by an initial ε-cleavage at eith...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms4037
更新日期:2014-01-01 00:00:00
abstract::The immunogenic heat shock proteins (HSPs) gp96, hsp70 and calreticulin (CRT) bind to CD91 on antigen-presenting cells (APCs) for cross-presentation of the HSP-chaperoned peptides. This event leads to priming of T-cell responses. Here we show that CD91 serves as a signalling receptor for these HSPs, allowing for the m...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms1524
更新日期:2011-11-01 00:00:00
abstract::Adaptive behavior requires integrating prior with current information to anticipate upcoming events. Brain structures related to this computation should bring relevant signals from the recent past into the present. Here we report that rats can integrate the most recent prior information with sensory information, there...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms14823
更新日期:2017-03-24 00:00:00
abstract::Six CO2 fixation pathways are known to operate in photoautotrophic and chemoautotrophic microorganisms. Here, we describe chemolithoautotrophic growth of the sulphate-reducing bacterium Desulfovibrio desulfuricans (strain G11) with hydrogen and sulphate as energy substrates. Genomic, transcriptomic, proteomic and meta...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-020-18906-7
更新日期:2020-10-09 00:00:00
abstract::ATP-dependent chromatin remodellers are mutated in more than 20% of human cancers. The consequences of these mutations on enzyme function are poorly understood. Here, we characterise the effects of CHD4 mutations identified in endometrial carcinoma on the remodelling properties of dMi-2, the highly conserved Drosophil...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-04503-2
更新日期:2018-05-29 00:00:00
abstract::The mixed layer of modern oceans is a zone of fully homogenized sediment resulting from bioturbation. The mixed layer is host to complex biogeochemical cycles that directly impact ecosystem functioning, affecting ocean productivity and marine biodiversity. The timing of origin of the mixed layer has been controversial...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-04311-8
更新日期:2018-05-15 00:00:00
abstract::Active biofluid management is central to the realization of wearable bioanalytical platforms that are poised to autonomously provide frequent, real-time, and accurate measures of biomarkers in epidermally-retrievable biofluids (e.g., sweat). Accordingly, here, a programmable epidermal microfluidic valving system is de...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-020-18238-6
更新日期:2020-09-02 00:00:00
abstract::The shape-controlled synthesis of nanoparticles was established in single-phase solutions by controlling growth directions of crystalline facets on seed nanocrystals kinetically; however, it was difficult to rationally predict and design nanoparticle shapes. Here we introduce a methodology to fabricate nanoparticles i...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms4870
更新日期:2014-05-14 00:00:00
abstract::EGFR is required for animal development, and dysregulation of EGFR is critically implicated in malignant transformation. However, the molecular mechanism underlying the regulation of EGFR expression remains poorly explored. Here we report that the zinc-finger protein ZNF516 is a transcription repressor. ZNF516 is phys...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-017-00702-5
更新日期:2017-09-25 00:00:00
abstract::Under hypoxia, most of glucose is converted to secretory lactate, which leads to the overuse of glutamine-carbon. However, under such a condition how glutamine nitrogen is disposed to avoid over-accumulating ammonia remains to be determined. Here we identify a metabolic flux of glutamine to secretory dihydroorotate, w...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-08033-9
更新日期:2019-01-14 00:00:00
abstract::Two-dimensional transition metal carbides (MXenes) have attracted a great interest of the research community as a relatively recently discovered large class of materials with unique electronic and optical properties. Understanding of adhesion between MXenes and various substrates is critically important for MXene devi...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-019-10982-8
更新日期:2019-07-08 00:00:00
abstract::Coalescence is an essential phenomenon that governs the equilibrium behaviour in a variety of systems from intercellular transport to planetary formation. In this report, we study coalescence pathways of circularly shaped two-dimensional colloidal membranes, which are one rod-length-thick liquid-like monolayers of ali...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms4063
更新日期:2014-01-01 00:00:00
abstract::Cryptosporidiosis in an enteric infection caused by Cryptosporidium parasites and is a major cause of acute infant diarrhea in the developing world. A major bottleneck to research progress is the lack of methods to cryopreserve Cryptosporidium oocysts, thus requiring routine propagation in laboratory animals. Here, we...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-05240-2
更新日期:2018-07-23 00:00:00
abstract::Macrophages are a major immune cell type infiltrating tumors and promoting tumor growth and metastasis. To elucidate the mechanism of macrophage recruitment, we utilize an overgrowth tumor model ("undead" model) in larval Drosophila imaginal discs that are attached by numerous macrophages. Here we report that changes ...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-020-17399-8
更新日期:2020-07-20 00:00:00
abstract::Stem cell transplantation is a promising strategy for therapeutic cardiac regeneration, but current therapies are limited by inefficient interaction between potentially beneficial cells (either exogenously transplanted or endogenously recruited) and the injured tissue. Here we apply targeted nanomedicine to achieve in...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms5880
更新日期:2014-09-10 00:00:00
abstract::The long external filament of bacterial flagella is composed of several thousand copies of a single protein, flagellin. Here, we explore the role played by lysine methylation of flagellin in Salmonella, which requires the methylase FliB. We show that both flagellins of Salmonella enterica serovar Typhimurium, FliC and...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-020-15738-3
更新日期:2020-04-24 00:00:00
abstract::Membrane-bound pyrophosphatases (M-PPases), which couple proton/sodium ion transport to pyrophosphate synthesis/hydrolysis, are important in abiotic stress resistance and in the infectivity of protozoan parasites. Here, three M-PPase structures in different catalytic states show that closure of the substrate-binding p...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms13596
更新日期:2016-12-06 00:00:00
abstract::By providing broad resistance to environmental biocides, transporters from the small multidrug resistance (SMR) family drive the spread of multidrug resistance cassettes among bacterial populations. A fundamental understanding of substrate selectivity by SMR transporters is needed to identify the types of selective pr...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-020-19820-8
更新日期:2020-11-27 00:00:00
abstract::The Greenland ice sheet has become one of the main contributors to global sea level rise, predominantly through increased meltwater runoff. The main drivers of Greenland ice sheet runoff, however, remain poorly understood. Here we show that clouds enhance meltwater runoff by about one-third relative to clear skies, us...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms10266
更新日期:2016-01-12 00:00:00
abstract::Observing the crucial first few femtoseconds of photochemical reactions requires tools typically not available in the femtochemistry toolkit. Such dynamics are now within reach with the instruments provided by attosecond science. Here, we apply experimental and theoretical methods to assess the ultrafast nonadiabatic ...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-017-01133-y
更新日期:2017-10-18 00:00:00
abstract::Since the observation of the first brown dwarf in 1995, numerous studies have led to a better understanding of the structures of these objects. Here we present a method for studying material resistivity in warm dense plasmas in the laboratory, which we relate to the microphysics of brown dwarfs through viscosity and e...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms9742
更新日期:2015-11-06 00:00:00
abstract::Optic atrophy 1 (OPA1) is a mitochondrial inner membrane protein that has an important role in mitochondrial fusion and structural integrity. Dysfunctional OPA1 mutations cause atrophy of the optic nerve leading to blindness. Here, we show that OPA1 has an important role in the innate immune system. Using conditional ...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-05387-y
更新日期:2018-07-27 00:00:00
abstract::Gfi1b is a transcriptional repressor expressed in hematopoietic stem cells (HSCs) and megakaryocytes (MKs). Gfi1b deficiency leads to expansion of both cell types and abrogates the ability of MKs to respond to integrin. Here we show that Gfi1b forms complexes with β-catenin, its co-factors Pontin52, CHD8, TLE3 and CtB...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-019-09273-z
更新日期:2019-03-20 00:00:00
abstract::The Cas9 endonuclease can be targeted to genomic sequences by programming the sequence of an associated single guide RNA (sgRNA). For unknown reasons, the activity of these Cas9-sgRNA combinations varies widely at different genomic loci and in different cell types. Thus, disrupting genes in polyploid cell lines or whe...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/ncomms12463
更新日期:2016-08-17 00:00:00
abstract::Knots are natural topologies of chains. Yet, little is known about spontaneous knot formation in a polypeptide chain-an event that can potentially impair its folding-and about the effect of a knot on the stability and folding kinetics of a protein. Here we used optical tweezers to show that the free energy cost to for...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-017-01691-1
更新日期:2017-11-17 00:00:00
abstract::DNA methylation plays important roles in prokaryotes, and their genomic landscapes-prokaryotic epigenomes-have recently begun to be disclosed. However, our knowledge of prokaryotic methylation systems is focused on those of culturable microbes, which are rare in nature. Here, we used single-molecule real-time and circ...
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-018-08103-y
更新日期:2019-01-11 00:00:00
abstract::The cytosolic antibody receptor TRIM21 possesses unique ubiquitination activity that drives broad-spectrum anti-pathogen targeting and underpins the protein depletion technology Trim-Away. This activity is dependent on formation of self-anchored, K63-linked ubiquitin chains by the heterodimeric E2 enzyme Ube2N/Ube2V2....
journal_title:Nature communications
pub_type: 杂志文章
doi:10.1038/s41467-019-12388-y
更新日期:2019-10-03 00:00:00