A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 143

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Attempt to read property "Count" on bool

Filename: helpers/my_audit_helper.php

Line Number: 3100

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Photophysics and peripheral ring size dependent aggregate emission of cross-conjugated enediynes: applications to white light emission and vapor sensing. | LitMetric

AI Article Synopsis

  • This research delves into the photophysical properties of Y-shaped organic dyes with connected aromatic groups, essential for uses in optoelectronics.
  • The study finds that electronic interactions among the aromatic units create broad absorption and unique emission signals, with observed aggregates that depend on the size of the rings present.
  • By analyzing these aggregates and their stability through different methods, the work showcases potential applications in white light emission and vapor sensing technology.

Article Abstract

Photophysical understanding of organic fluorophores with π-conjugated scaffolds is crucial as such dyes are central to optoelectronic applications. This work presents a detailed photophysical investigation of a class of cross-conjugated homo- and hetero-enediynes (Y-shaped) peripherally attached to common aromatic moieties such as benzene, naphthalene, and anthracene. The cross-communicated electronic communication among the three aromatic units located at the tri-poles of the Y-shaped enediynes results in a broad S → S absorption band and locally excited (LE) emission signals. In addition to the LE emission band, a red-shifted aggregate emission is observed for some of the dyes in non-aqueous solvents where a clear size dependence of the peripheral aromatic rings is noted for the appearance of the aggregate fluorescence. The aggregates are static in nature as is evident from ground-state absorption spectral changes and the absence of rise-time in the time-resolved fluorescence decay studies, which are substantiated further through nuclear magnetic resonance spectroscopy and single-crystal X-ray diffraction experiments. Molecular orbital calculations support the local nature of the dominant electronic transition. The optimized ground state geometries of the dyes from partially to fully propeller shaped structures confirm the ring-size dependence of the aggregates. The LE and aggregate state emissions are judiciously exploited to generate single-component white light emission in binary solvent mixtures. The excited state photophysics are further applied toward polar aprotic vapor sensing in the solid state.

Download full-text PDF

Source
http://dx.doi.org/10.1039/c7cp08091cDOI Listing

Publication Analysis

Top Keywords

aggregate emission
8
white light
8
light emission
8
vapor sensing
8
emission
6
photophysics peripheral
4
peripheral ring
4
ring size
4
size dependent
4
aggregate
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: