High throughput electron transfer from carbon dots to chloroplast: a rationale of enhanced photosynthesis

Chandra, Sourov; Pradhan, Sambhu Nath; Mitra, Shouvik; Patra, Prasun; Bhattacharya, A. K.; Pramanik, Panchanan; Goswami, Arunava

doi:10.1039/c3nr06079a

Cited by 146 publications

(112 citation statements)

References 46 publications

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“…The corresponding ATR‐FTIR spectra (Figure a) reveal that the newly formed G‐CDs made at various temperatures share the same hydrophobic functional groups such as C−N (

\overset{ν}{true}

=1267 cm −1 ), N−O (

\overset{ν}{true}

=1550 cm −1 ), and C=C (

\overset{ν}{true}

=2200 cm −1 ), in addition to hydrophilic functional groups such as C=O (

\overset{ν}{true}

≈1760–1665 cm −1 ) and N−H and O−H (

\overset{ν}{true}

≈3334–3162 cm −1 ), most of which were previously confirmed by XPS and UV/Vis spectroscopy. The large amounts of hydrophilic groups give the G‐CDs high water solubility.…”

Section: Resultssupporting

confidence: 58%

Gel‐like Carbon Dots: Characterization and their Potential Applications

Zhou

Desserre²,

Sharma

et al. 2017

ChemPhysChem

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Highly photoluminescent gel-like carbon dots (G-CDs) were successfully synthesized for the first time by a rapid one-step solvothermal synthesis approach with citric acid and 1,2-ethylenediamine as the precursors. Their gel-like nature was revealed by the Tyndall and coagulation effects, which were elucidated by a negative ζ potential value. The influences of temperature on the properties and sizes of these G-CDs were analyzed, and the best method for a maximum quantum yield was identified. The resulting products emitted blue photoluminescence under UV light (λ=365 nm) and a gradient of color under regular light. In addition, the UV/Vis absorption and fluorescence emission spectra of the G-CDs indicated that those synthesized at 160 °C exhibited the highest fluorescence quantum yield (33 %). Atomic force microscopy and transmission electron microscopy measurements were performed, and a higher temperature of formation resulted in smaller G-CDs. Furthermore, band shifts in the UV/Vis and fluorescence spectra and sequential changes in the quantum yield values and ζ potentials in addition to elemental compositional changes as determined by X-ray photoelectron spectroscopy were monitored throughout the formation process of the G-CDs. As to applications, G-CDs were prepared as an invisible ink for printers, which exhibited the applicability of G-CDs in daily life and military activities.

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“…The corresponding ATR‐FTIR spectra (Figure a) reveal that the newly formed G‐CDs made at various temperatures share the same hydrophobic functional groups such as C−N (

\overset{ν}{true}

=1267 cm −1 ), N−O (

\overset{ν}{true}

=1550 cm −1 ), and C=C (

\overset{ν}{true}

=2200 cm −1 ), in addition to hydrophilic functional groups such as C=O (

\overset{ν}{true}

≈1760–1665 cm −1 ) and N−H and O−H (

\overset{ν}{true}

≈3334–3162 cm −1 ), most of which were previously confirmed by XPS and UV/Vis spectroscopy. The large amounts of hydrophilic groups give the G‐CDs high water solubility.…”

Section: Resultssupporting

confidence: 58%

Gel‐like Carbon Dots: Characterization and their Potential Applications

Zhou

Desserre²,

Sharma

et al. 2017

ChemPhysChem

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“…Chandra et al, 121 developed biocompatible amine-functionalized fluorescent carbon dots and isolated them for gram-scale applications. Chandra et al, 121 developed biocompatible amine-functionalized fluorescent carbon dots and isolated them for gram-scale applications.…”

Section: Nano-agriculture: Nanobiotechnology Applications To Crop-scimentioning

confidence: 99%

Plant-derived nanostructures: types and applications

et al. 2016

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Graphical abstract:Significant recent developments in plant-derived nanostructures, their classes, and vital applications are discussed with insight into their use as a bio-renewable, sustainable, and diversified resource for the production of useful nanostructures. AbstractPlant-derived nanostructures and nanoparticles (NPs) have functional applications in numerous disciplines such as health care, food and feed, cosmetics, biomedical science, energy science, drug-gene delivery, environmental health, and so on. Consequently, it is imperative for researchers to understand that plants are cost-effective, sustainable and renewable platforms, and therefore, they are ideal sources for production of natural NPs. This critical review discusses significant recent developments pertaining to plant-derived nanostructures, their classes, and vital applications. The aim is to provide insight into the use of plants as a bio-renewable, sustainable, diversified resource and platform for the production of useful nanostructures and NPs, with functions in various fields, including medicine, industry, agriculture, and pharmaceuticals.

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“…(6) (7) (8) (Bai et al, 2014;Chandra et al, 2014;Chang et al, 2013) Hasil pengujian menggunakan spektrofotometer FTIR Antosianin merupakan senyawa yang mudah rusak pada suhu tinggi. Sampel juga ditambahkan etanol 96% untuk mengikat sisa air yang terdapat dalam sampel dan menjadikannya lebih mudah menguap.…”

Section: Hasil Analisis Menggunakan Spektrofotometer Uv-visunclassified

STUDI POTENSI EKSTRAK DAUN ADAM HAWA (Rhoeo discolor) SEBAGAI INDIKATOR TITRASI ASAM-BASA

2016

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Abstrak: Daun adam hawa memiliki pigmen warna ungu yang diduga berasal dari antosianin. Pigmen antosianin ini bersifat larut dalam air sehingga mampu bereaksi baik dengan asam maupun basa. Karakterisitik perubahan warna ini menjadi potensi ekstrak daun adam hawa sebagai indikator dalam menentukan titik akhir pada titrasi asam basa. Perbandingan pelarut etanol 70% : ekstrak daun adam hawa (2:1) mampu mengekstrak metabolit sekunder secara optimal dengan metode ekstrasi teknik maserasi selama 24 jam. Karakterisasi indikator ini meliputi uji perubahan warna dalam berbagai pH, titrasi asam basa konvensional dan autotitrator, perbandingannya dengan indikator fenolftalein (PP) dan metil jingga (MJ), identifikasi menggunakan spektrofotometer sinar tampak dan FTIR serta uji waktu simpan indikator. Hasil karakterisasi menunjukkan, indikator memiliki perubahan warna dari jingga kemerahan-hijau kecoklatan dengan trayek pH 4,75-6,75 pada daerah serapan λ maksimum 510,01-591,99 nm, memiliki persentase selisih dengan indikator PP sebesar 0,915% dan indikator MJ sebesar 0,925%, serta dapat digunakan sampai empat minggu. PENDAHULUANDaun adam hawa (Rhoeo discolor) merupakan tanaman yang mudah dijumpai di Indonesia. Pigmen merah dan pigmen hijau yang menjadi ciri khas dari tumbuhan tersebut dihasilkan dari senyawa flavonoid yaitu antosianin dan pigmen klorofil (Kadir, 2008).Senyawa yang berperan dalam perubahan warna indikator alami adalah antosianin yang juga merupakan metabolit sekunder golongan flavonoid dan termasuk pigmen yang larut dalam air secara alami sehingga memiliki kemampuan untuk bereaksi baik dengan asam maupun dengan basa. Antosianin berwarna merah dalam media asam, dan berubah menjadi ungu dan biru pada media basa (Winarno, 1992).Titrasi asam basa merupakan salah satu metode analisis kuantitatif untuk menentukan konsentrasi dari suatu zat yang ada dalam larutan. Keberhasilan dalam titrasi asam-basa sangat ditentukan oleh kinerja indikator yang mampu menunjukkan titik akhir dari titrasi. Indikator merupakan suatu zat yang ditambahkan ke dalam larutan sampel sebagai penanda yang menunjukkan telah terjadinya titik akhir titrasi pada analisis volumetrik. Suatu zat dapat dikatakan sebagai indikator titrasi asam basa jika dapat memberikan perubahan warna sampel seiring dengan terjadinya perubahan konsentrasi ion hidrogen atau perubahan pH (Day & Underwood, 1986).Indikator asam basa yang sering digunakan di laboratorium untuk titrasi asam basa merupakan indikator sintetis contohnya fenolftalein (PP) dan metil jingga (MJ). Setiap indikator sintetis memiliki harga yang cukup mahal, serta dapat menyebabkan polusi lingkungan. Harga indikator titrasi asam basa yang mahal membuat terbatasnya percobaan titrasi tersebut terutama di sekolah-sekolah yang berada jauh dari perkotaan.Kandungan antosianin yang terdapat pada daun adam hawa menyimpan potensi besar sebagai indikator titrasi asam basa.Ekstraksi menggunakan teknik maserasi yang merupakan metode yang paling umum digunakan untuk memisahkan kandungan senyawa kimia pada jari...

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High throughput electron transfer from carbon dots to chloroplast: a rationale of enhanced photosynthesis

Cited by 146 publications

References 46 publications

Gel‐like Carbon Dots: Characterization and their Potential Applications

Gel‐like Carbon Dots: Characterization and their Potential Applications

Plant-derived nanostructures: types and applications

STUDI POTENSI EKSTRAK DAUN ADAM HAWA (Rhoeo discolor) SEBAGAI INDIKATOR TITRASI ASAM-BASA

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