Evidence map›Paper›PMID 35519869›Full record

ArticleRSC advances2019

Theoretical study on the electronic structure and second-order nonlinear optical properties of benzannulated or selenophene-annulated expanded helicenes.

Li-Jing Gong, Chun-Yu Liu, Cheng Ma, Wan-Feng Lin, Jin-Kai Lv, Xiang-Yu Zhang

Abstract read
In one paragraph

Article in RSC advances, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Expanding Chemistry of Expanded Helicenes.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025
    Review
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Li-Jing GongAviation University of Air Force Changchun 130022 Jilin China gonglijing@126.com.ORCID https://orcid.org/0000-0002-1533-5474
Chun-Yu LiuInstitute of Functional Material Chemistry, National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University Changchun 130024 Jilin China.
Cheng MaAviation University of Air Force Changchun 130022 Jilin China gonglijing@126.com.
Wan-Feng LinAviation University of Air Force Changchun 130022 Jilin China gonglijing@126.com.
Jin-Kai LvAviation University of Air Force Changchun 130022 Jilin China gonglijing@126.com.
Xiang-Yu ZhangAviation University of Air Force Changchun 130022 Jilin China gonglijing@126.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Currently, discovering new materials with superior second-order nonlinear optical (NLO) performance has become a very hot research topic in the fields of chemistry and materials science. Now, density functional theory (DFT) has become a powerful tool to predict the performance of novel materials. In this paper, based on benzannulated and selenophene-annulated expanded helicenes, twenty-six helicenes are designed by introduction donor/acceptor moieties and their combinations at different substituent positions. The geometrical/electronic structures, electronic transition, and second-order NLO properties of these helicenes are full investigated by DFT/TDDFT theory. The investigations show that these helicenes have large first hyperpolarizability values (

Identifiers

PMID35519869
PMCPMC9064566

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.