1
|
Wang W, Mao Y, Yang Z, Chen M. Theoretical study on photoinduced charge transfer in one-photon and two-photon absorption of branching oligofluorenes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123826. [PMID: 38181622 DOI: 10.1016/j.saa.2023.123826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/07/2023] [Accepted: 12/27/2023] [Indexed: 01/07/2024]
Abstract
Oligofluorenes have been identified as very promising two-photon absorption (TPA) materials and present great application potential for the fabrication of nonlinear optical devices, but the TPA mechanism and corresponding electron excitation properties have not been studied. Here, the photoinduced charge transfer characteristics of V-shaped and Y-shaped branching oligofluorenes that consist of two and three fluorene units in each branch during one-photon absorption (OPA) and TPA processes are analyzed theoretically using the density functional theory and visualization sum-over-states model. The calculated results show that the OPA intensity and TPA cross-section are significantly enhanced by increasing the branch length or changing the structure from V-shaped to Y-shaped. The long-distance charge transfer only occurs on the second transition of TPA at high excited states. Compared to Y-shaped molecules, V-shaped structures exhibit a stronger cooperative effect among the different branches.
Collapse
Affiliation(s)
- Wenjun Wang
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR China
| | - Ye Mao
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR China.
| | - Zijiang Yang
- School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, PR China
| | - Maodu Chen
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR China.
| |
Collapse
|
2
|
Alvarez-Venicio V, Castro-Beltrán R, Ramos-Ortiz G, Rodríguez M, Alba-Rosales JE, Gutiérrez-Juárez G, Santillán R, Ochoa ME, Flores-Villavicencio LL, Sabanero-López M. Red fluorescent benzothiadiazole derivative loaded in different nanoformulations: Optical properties and their use in bio-imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 290:122250. [PMID: 36566533 DOI: 10.1016/j.saa.2022.122250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Fluorophores with optimized nonlinear optical properties have become prominent as contrast labels in laser scanning microscopy (LSM). The purpose of this work is to report on a novel benzothiadiazole derivative, namely 4,7-bis(5-((9,9-dioctyl-9H-fluoren-2-yl)ethynyl)thiophen-2-yl)benzo[c][1,2,5]thiadiazole (EFBT) and its optical performance when it is loaded into organic nanostructures intended as labels for LSM. Four different nanostructured labels were prepared: i) EFBT-loaded silica nanoparticles (SiNPs); ii) folate-bioconjugated SiNPs (SiNPs-FA); iii) EFBT-loaded PEGylated nanoparticles (NPs-PEG); and iv) EFBT-loaded folate-terminated PEGylated nanoparticles (NPs-PEG-FA). All these nanostructures are reported through a comparative study of their linear and nonlinear optical properties, including their performance as exogenous label agents in the cervical cancer cell line HeLa. This assessment of the performance of a specific fluorophore loaded into different nanostructured matrices (labels), and fairly compared under the same characterization conditions, including the LSM settings, is less common while previous reports had focused in comparing silica and PEGylated nanoparticles but loaded with different fluorophores. The results show that the internal molecular organization into each type of organic nanostructure impacted differently the properties of EFBT, where the silica matrix tend to preserve the optical performance of the fluorophore by preventing intermolecular interactions; in contrast, PEGylated nanoparticles favored molecular interactions and introduced non-radiative decay channels that degrades drastically the optical performance. Nevertheless, the use of functionalized ends entities produced a better cellular label uptake with PEGylated that with silica nanoparticles. In overall, the NPs-PEG-FA label produced the best HeLa imaging.
Collapse
Affiliation(s)
- V Alvarez-Venicio
- Centro de Investigaciones en Óptica A.P. 1-948, 37000 León, Gto., Mexico
| | - R Castro-Beltrán
- Departamento de Ingeniería Física, División de Ciencias e Ingenierías, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, C.P. 37150, León, Guanajuato, México
| | - G Ramos-Ortiz
- Centro de Investigaciones en Óptica A.P. 1-948, 37000 León, Gto., Mexico.
| | - M Rodríguez
- Centro de Investigaciones en Óptica A.P. 1-948, 37000 León, Gto., Mexico.
| | - J E Alba-Rosales
- Centro de Investigaciones en Óptica A.P. 1-948, 37000 León, Gto., Mexico; Departamento de Ingeniería Física, División de Ciencias e Ingenierías, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, C.P. 37150, León, Guanajuato, México
| | - G Gutiérrez-Juárez
- Departamento de Ingeniería Física, División de Ciencias e Ingenierías, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, C.P. 37150, León, Guanajuato, México
| | - R Santillán
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, 07000, Apdo. Postal. 14-740, México D.F., Mexico
| | - M E Ochoa
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, 07000, Apdo. Postal. 14-740, México D.F., Mexico
| | - L L Flores-Villavicencio
- Departamento de Biología, División de Ciencias Naturales y Exactas, campus Guanajuato, Universidad de Guanajuato, Guanajuato 36050, Mexico
| | - M Sabanero-López
- Departamento de Biología, División de Ciencias Naturales y Exactas, campus Guanajuato, Universidad de Guanajuato, Guanajuato 36050, Mexico
| |
Collapse
|
3
|
Pichardo-Molina JL, Cardoso-Avila PE, Patakfalvi RJ, Aparicio-Ixta L, Pedro-García F, Ojeda-Galvan HJ, Flores-Villavicencio LL, Villagómez-Castro JC. One-pot room-temperature direct synthesis of bovine serum albumin-based fluorescent carbon nanoparticles. Int J Biol Macromol 2023; 224:1166-1173. [PMID: 36306911 DOI: 10.1016/j.ijbiomac.2022.10.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/20/2022] [Accepted: 10/22/2022] [Indexed: 11/05/2022]
Affiliation(s)
- J L Pichardo-Molina
- Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Colonia Lomas del Campestre, C.P. 37150 León, Guanajuato, Mexico.
| | - P E Cardoso-Avila
- Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Colonia Lomas del Campestre, C.P. 37150 León, Guanajuato, Mexico
| | - R J Patakfalvi
- Departamento de Ciencias de la Tierra y de la Vida, Centro Universitarios de los Lagos, Universidad de Guadalajara, Paseo de Los Fresnos 332, Paseos de La Montaña, C.P. 47463 Lagos de Moreno, Jalisco, Mexico
| | - L Aparicio-Ixta
- Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Colonia Lomas del Campestre, C.P. 37150 León, Guanajuato, Mexico
| | - F Pedro-García
- Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Colonia Lomas del Campestre, C.P. 37150 León, Guanajuato, Mexico
| | - H J Ojeda-Galvan
- Centro de Investigación en Ciencias de la Salud y Biomedicina (CICSaB), Universidad Autónoma de San Luis Potosí, Av. Sierra Leona #550, Col. Lomas 2a. Sección, C.P. 78210 San Luis Potosí, SLP, Mexico
| | - L L Flores-Villavicencio
- Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N Col. Noria Alta, C.P. 36050, Guanajuato, Guanajuato, Mexico
| | - J C Villagómez-Castro
- Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N Col. Noria Alta, C.P. 36050, Guanajuato, Guanajuato, Mexico
| |
Collapse
|
4
|
Cruz-Rosado A, Romero-Hernández JE, Ríos-López M, López-Morales S, Cedillo G, Ríos-Ruiz LM, Cetina-Mancilla E, Palacios-Alquisira J, Zolotukhin MG, Vivaldo-Lima E. Molecular weight development in the superacid-catalyzed polyhydroxyalkylation of 1-propylisatin and biphenyl at stoichiometric conditions. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
5
|
Bag SS, Gogoi H, Sinha S. Synthesis and studies on the photophysical/biophysical properties of triazolylfluorene-labeled 2′-deoxyuridines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Ferrocene-containing cross-conjugated polymers synthesized by palladium-catalyzed cross-coupling polymerization. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122827] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
7
|
Hu Y, Wang Y, Yan J, Wen N, Xiong H, Cai S, He Q, Peng D, Liu Z, Liu Y. Dynamic DNA Assemblies in Biomedical Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000557. [PMID: 32714763 PMCID: PMC7375253 DOI: 10.1002/advs.202000557] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/07/2020] [Indexed: 05/13/2023]
Abstract
Deoxyribonucleic acid (DNA) has been widely used to construct homogeneous structures with increasing complexity for biological and biomedical applications due to their powerful functionalities. Especially, dynamic DNA assemblies (DDAs) have demonstrated the ability to simulate molecular motions and fluctuations in bionic systems. DDAs, including DNA robots, DNA probes, DNA nanochannels, DNA templates, etc., can perform structural transformations or predictable behaviors in response to corresponding stimuli and show potential in the fields of single molecule sensing, drug delivery, molecular assembly, etc. A wave of exploration of the principles in designing and usage of DDAs has occurred, however, knowledge on these concepts is still limited. Although some previous reviews have been reported, systematic and detailed reviews are rare. To achieve a better understanding of the mechanisms in DDAs, herein, the recent progress on the fundamental principles regarding DDAs and their applications are summarized. The relative assembly principles and computer-aided software for their designing are introduced. The advantages and disadvantages of each software are discussed. The motional mechanisms of the DDAs are classified into exogenous and endogenous stimuli-triggered responses. The special dynamic behaviors of DDAs in biomedical applications are also summarized. Moreover, the current challenges and future directions of DDAs are proposed.
Collapse
Affiliation(s)
- Yaqin Hu
- Department of Pharmaceutical EngineeringCollege of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan410083P. R. China
| | - Ying Wang
- Department of Pharmaceutical EngineeringCollege of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan410083P. R. China
| | - Jianhua Yan
- Xiangya School of Pharmaceutical SciencesCentral South UniversityChangshaHunan410013P. R. China
| | - Nachuan Wen
- Department of Pharmaceutical EngineeringCollege of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan410083P. R. China
| | - Hongjie Xiong
- Xiangya School of Pharmaceutical SciencesCentral South UniversityChangshaHunan410013P. R. China
| | - Shundong Cai
- Xiangya School of Pharmaceutical SciencesCentral South UniversityChangshaHunan410013P. R. China
| | - Qunye He
- Xiangya School of Pharmaceutical SciencesCentral South UniversityChangshaHunan410013P. R. China
| | - Dongming Peng
- Department of Medicinal ChemistrySchool of PharmacyHunan University of Chinese MedicineChangshaHunan410013P. R. China
| | - Zhenbao Liu
- Xiangya School of Pharmaceutical SciencesCentral South UniversityChangshaHunan410013P. R. China
- Molecular Imaging Research Center of Central South UniversityChangshaHunan410013P. R. China
| | - Yanfei Liu
- Department of Pharmaceutical EngineeringCollege of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan410083P. R. China
| |
Collapse
|
8
|
Mahapatra M, Dutta A, Roy JSD, Mitra M, Mahalanobish S, Sanfui MDH, Banerjee S, Chattopadhyay PK, Sil PC, Singha NR. Fluorescent Terpolymers via In Situ Allocation of Aliphatic Fluorophore Monomers: Fe(III) Sensor, High-Performance Removals, and Bioimaging. Adv Healthc Mater 2019; 8:e1900980. [PMID: 31664786 DOI: 10.1002/adhm.201900980] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/21/2019] [Indexed: 12/22/2022]
Abstract
Herein, purely aliphatic intrinsically fluorescent terpolymers, i.e., 1 and 2, are synthesized through one-pot solution polymerization via N-H functionalized and multi C-C/C-N coupled in situ protrusion of fluorescent monomers using two nonemissive monomers. These scalable terpolymers are suitable for highly selective Fe(III) sensing, high-performance exclusion of Fe(III), logic function and the imaging of normal mammalian Madin-Darby canine kidney and human osteosarcoma cancer cell lines. The structures of terpolymers, in situ attachment of fluorescent monomers, clusteroluminescence, adsorption-mechanism, and cell-imaging abilities are understood via unadsorbed and/or adsorbed microstructural analyses using 1 H/13 C NMR, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, UV-vis spectroscopy, atomic absorption spectroscopy, thermogravimetric analysis, high-resolution transmission electron microscopy, dynamic light scattering, fluorescence imaging, and fluorescence lifetime. The geometries, electronic structures, location of fluorophores, and singlet-singlet absorption and emission of terpolymers are examined using density functional theory (DFT) and time-dependent DFT. For the precise identification of fluorophores, transition from occupied natural transition orbitals (NTOs) to unoccupied NTOs is computed. For 1/2, limit of detection (LOD) values and adsorption capacities are 6.0 × 10-7 /8.0 × 10-7 m and 147.82/120.56 mg g-1 at pHi = 7.0 and 303 K, respectively. The overall properties of 1 are more advantageous compared to 2 in sensing, cell imaging, and adsorptive exclusion of Fe(III).
Collapse
Affiliation(s)
- Manas Mahapatra
- Advanced Polymer LaboratoryDepartment of Polymer Science and TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Arnab Dutta
- Advanced Polymer LaboratoryDepartment of Polymer Science and TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Joy Sankar Deb Roy
- Advanced Polymer LaboratoryDepartment of Polymer Science and TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Madhushree Mitra
- Department of Leather TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Sushweta Mahalanobish
- Division of Molecular MedicineBose Institute P‐1/12, CIT Scheme VII M Kolkata 700054 West Bengal India
| | - MD Hussain Sanfui
- Advanced Polymer LaboratoryDepartment of Polymer Science and TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Snehasis Banerjee
- Department of ChemistryGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Pijush Kanti Chattopadhyay
- Department of Leather TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| | - Parames C. Sil
- Division of Molecular MedicineBose Institute P‐1/12, CIT Scheme VII M Kolkata 700054 West Bengal India
| | - Nayan Ranjan Singha
- Advanced Polymer LaboratoryDepartment of Polymer Science and TechnologyGovernment College of Engineering and Leather Technology (Post Graduate)Maulana Abul Kalam Azad University of Technology Salt Lake City Kolkata 700106 West Bengal India
| |
Collapse
|
9
|
Zhao G, Wu H, Feng R, Wang D, Xu P, Wang H, Guo Z, Chen Q. Bimetallic Zeolitic Imidazolate Framework as an Intrinsic Two-Photon Fluorescence and pH-Responsive MR Imaging Agent. ACS OMEGA 2018; 3:9790-9797. [PMID: 31459108 PMCID: PMC6644450 DOI: 10.1021/acsomega.8b00923] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/08/2018] [Indexed: 05/29/2023]
Abstract
Zeolitic imidazolate framework-8 (ZIF-8) has received wide attention in recent years as a potential drug vehicle for the treatment of cancer due to its acid-responsiveness and moderate biocompatibility. However, its congenital deficiency of intrinsic imaging capability limits its wider applications; therefore, a postsynthetic exchange approach was utilized to introduce paramagnetic manganese(II) ions into the ZIF-8 matrix. As a result, bimetallic zeolitic imidazolate frameworks (Mn-Zn-ZIF) were thus fabricated and exhibited pH-responsive T1-weighted magnetic resonance imaging (MRI) contrast effect. Remarkably, we also found its own fluorescence derived from 2-methylimidazole, which is the first report of the intrinsic two-photon fluorescence imaging of ZIFs to our knowledge. Mn-Zn-ZIF still preserves the original properties of ZIF-8 of high surface areas, microporosity, and acid sensitivity. After further PEGylation of Mn-Zn-ZIF, the nanoparticles showed no obvious toxicity and its MRI contrast effect has also been enhanced. Our work highlights the promise of modified zeolitic imidazolate frameworks as potential cancer theranostic platforms.
Collapse
Affiliation(s)
- Gaozheng Zhao
- Hefei
National Laboratory for Physical Sciences at Microscale, Department
of Materials Science & Engineering & Collaborative Innovation
Center of Suzhou Nano Science and Technology, CAS High Magnetic Field
Laboratory, University of Science and Technology
of China, Hefei 230026, China
| | - Huihui Wu
- Anhui
Key Laboratory for Cellular Dynamics and Chemical Biology, School
of Life Sciences, University of Science
and Technology of China, Hefei 230027, China
| | - Ruilu Feng
- Hefei
National Laboratory for Physical Sciences at Microscale, Department
of Materials Science & Engineering & Collaborative Innovation
Center of Suzhou Nano Science and Technology, CAS High Magnetic Field
Laboratory, University of Science and Technology
of China, Hefei 230026, China
| | - Dongdong Wang
- Hefei
National Laboratory for Physical Sciences at Microscale, Department
of Materials Science & Engineering & Collaborative Innovation
Center of Suzhou Nano Science and Technology, CAS High Magnetic Field
Laboratory, University of Science and Technology
of China, Hefei 230026, China
| | - Pengping Xu
- Hefei
National Laboratory for Physical Sciences at Microscale, Department
of Materials Science & Engineering & Collaborative Innovation
Center of Suzhou Nano Science and Technology, CAS High Magnetic Field
Laboratory, University of Science and Technology
of China, Hefei 230026, China
| | - Haibao Wang
- Radiology
Department of the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Zhen Guo
- Anhui
Key Laboratory for Cellular Dynamics and Chemical Biology, School
of Life Sciences, University of Science
and Technology of China, Hefei 230027, China
| | - Qianwang Chen
- Hefei
National Laboratory for Physical Sciences at Microscale, Department
of Materials Science & Engineering & Collaborative Innovation
Center of Suzhou Nano Science and Technology, CAS High Magnetic Field
Laboratory, University of Science and Technology
of China, Hefei 230026, China
| |
Collapse
|
10
|
Salas-Alcántara KM, Aparicio-Ixta L, Torres-Gómez I, Rodríguez M, Ramos-Ortiz G, Espinosa-Luna R, Pichardo-Molina JL. Modal interferometer based on a single mechanically induced long-period fiber grating and a nanoparticles-coated film section. OPTICS LETTERS 2017; 42:1780-1783. [PMID: 28454159 DOI: 10.1364/ol.42.001780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A modal interferometer by a single mechanically induced long-period fiber grating (MI-LPFG) using a half-length coating fiber is presented. The coating material used for this Letter is a film of silica nanoparticles doped with an organic chromophore. The silica nanoparticles, with diameters within the range of 40-50 nm, were deposited over 3.5 cm length of fiber by the dip-coating method, forming a film with a thickness between 500 and 1250 nm. Then the modal interferometer was implemented by inscribing the MI-LPFG over the coated fiber section and a similar fiber length of the uncoated fiber. The experimental results show high-contrast transmission bands, where the position and depth of the absorption envelope band are finely selected by the grating period, the pressure applied, and the film thickness. The novel modal interferometer architecture based on a single MI-LPFG, combined with a functionalized nanoparticles coating film, offers an attractive platform for the development of fiber sensors and other fiber-based devices.
Collapse
|
11
|
Lou X, Zhao Z, Tang BZ. Organic Dots Based on AIEgens for Two-Photon Fluorescence Bioimaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:6430-6450. [PMID: 27356782 DOI: 10.1002/smll.201600872] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/12/2016] [Indexed: 06/06/2023]
Abstract
Two-photon fluorescence imaging technique is a powerful bioanalytical approach in terms of high photostability, low photodamage, high spatiotemporal resolution. Recently, fluorescent organic dots comprised of organic emissive cores and a polymeric matrix are emerging as promising contrast reagents for two-photon fluorescence imaging, owing to their numerous merits of high and tunable fluorescence, good biocompatibility, strong photobleaching resistance, and multiple surface functionality. The emissive core is crucial for organic dots to get high brightness but many conventional chromophores often encounter a severe problem of fluorescence quenching when they form aggregates. To solve this problem, fluorogens featuring aggregation-induced emission (AIE) can fluoresce strongly in aggregates, and thus become ideal candidates for fluorescent organic dots. In addition, two-photon absorption property of the dots can be readily improved by just increase loading contents of AIE fluorogen (AIEgen). Hence, organic dots based on AIEgens have exhibited excellent performances in two-photon fluorescence in vitro cellular imaging, and in vivo vascular architecture visualization of mouse skin, muscle, brain and skull bone. In view of the rapid advances in this important research field, here, we highlight representative fluorescent organic dots with an emissive core of AIEgen aggregate, and discuss their great potential in bioimaging applications.
Collapse
Affiliation(s)
- Xiaoding Lou
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong, China
| |
Collapse
|
12
|
Farcas A, Assaf KI, Resmerita AM, Cantin S, Balan M, Aubert PH, Nau WM. Cucurbit[7]uril-based fluorene polyrotaxanes. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.08.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
13
|
Kulkarni B, Surnar B, Jayakannan M. Dual Functional Nanocarrier for Cellular Imaging and Drug Delivery in Cancer Cells Based on π-Conjugated Core and Biodegradable Polymer Arms. Biomacromolecules 2016; 17:1004-16. [DOI: 10.1021/acs.biomac.5b01654] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bhagyashree Kulkarni
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha
Road, Pune, 411008 Maharashtra, India
| | - Bapurao Surnar
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha
Road, Pune, 411008 Maharashtra, India
| | - Manickam Jayakannan
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha
Road, Pune, 411008 Maharashtra, India
| |
Collapse
|
14
|
Romero-Servin S, Lozano-Hernández LA, Maldonado JL, Carriles R, Ramos-Ortíz G, Pérez-Gutiérrez E, Scherf U, Zolotukhin MG. Light Emission Properties of a Cross-Conjugated Fluorene Polymer: Demonstration of Its Use in Electro-Luminescence and Lasing Devices. Polymers (Basel) 2016; 8:polym8020043. [PMID: 30979138 PMCID: PMC6432540 DOI: 10.3390/polym8020043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/29/2016] [Accepted: 02/01/2016] [Indexed: 11/16/2022] Open
Abstract
Light emission properties of a fluorene cross-conjugated polymer (PF–1) based on the monomer 4,7-bis[2-(9,9-dimethyl)fluorenyl] benzo[1,2,5]thiadiazole are reported. This polymer exhibits solubility at high concentrations, good processability into thin solid films of good quality and a broad emission band with a fluorescence quantum yield of approximately 1. Based on these features, in this paper we implemented the use of PF–1 as an active layer in polymer light-emitting diodes (PLEDs) and as a laser gain medium in solution. To get insight on the conducting properties of PF–1, two different electron injectors, poly [(9,9-bis(3′-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9–dioctylfluorene)] (PFN) and lithium fluoride (LiF), were used in a simple PLED architecture. PLEDs with the PFN film were found to exhibit better performance with a maximum luminous efficiency of 40 cd/A, a turn-on voltage (Von) of approximately 4.5 V and a luminance maximum of 878 cd/m2 at 5.5 V, with a current density of 20 A/m2. For the lasing properties of PF–1, we found a lasing threshold of around 75 μJ and a tunability of 20 nm. These values are comparable with those of rhodamine 6G, a well-known laser dye.
Collapse
Affiliation(s)
| | | | - José-Luis Maldonado
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | - Ramón Carriles
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | - Gabriel Ramos-Ortíz
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | | | - Ullrich Scherf
- Macromolecular Chemistry Group, Wuppertal University, Gauss-Str. 20, D-42097 Wuppertal, Germany.
| | - Mikhail G Zolotukhin
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A. P. 70-360, 04510 México D. F., Mexico.
| |
Collapse
|
15
|
Lv Y, Liu P, Ding H, Wu Y, Yan Y, Liu H, Wang X, Huang F, Zhao Y, Tian Z. Conjugated Polymer-Based Hybrid Nanoparticles with Two-Photon Excitation and Near-Infrared Emission Features for Fluorescence Bioimaging within the Biological Window. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20640-20648. [PMID: 26340609 DOI: 10.1021/acsami.5b05150] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Hybrid fluorescent nanoparticles (NPs) capable of fluorescing near-infrared (NIR) light (centered ∼730 nm) upon excitation of 800 nm laser light were constructed. A new type of conjugated polymer with two-photon excited fluorescence (TPEF) feature, P-F8-DPSB, was used as the NIR-light harvesting component and the energy donor while a NIR fluorescent dye, DPA-PR-PDI, was used as the energy acceptor and the NIR-light emitting component for the construction of the fluorescent NPs. The hybrid NPs possess δ value up to 2.3 × 10(6) GM per particle upon excitation of 800 nm pulse laser. The excellent two-photon absorption (TPA) property of the conjugated polymer component, together with its high fluorescence quantum yield (ϕ) up to 45% and the efficient energy transfer from the conjugated polymer to NIR-emitting fluorophore with efficiency up to 90%, imparted the hybrid NPs with TPEF-based NIR-input-NIR-output fluorescence imaging ability with penetration depth up to 1200 μm. The practicability of the hybrid NPs for fluorescence imaging in Hela cells was validated.
Collapse
Affiliation(s)
- Yanlin Lv
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, China
| | - Peng Liu
- Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials & Devices, South China University of Technology , Guangzhou, 510640, China
| | - Hui Ding
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, China
| | - Yishi Wu
- Beijing National Laboratory for Molecular Science (BNLMS) and Key Laboratory for Photochemistry, Institute of Chemistry Chinese Academy of Sciences , Beijing, 100190, China
| | - Yongli Yan
- Beijing National Laboratory for Molecular Science (BNLMS) and Key Laboratory for Photochemistry, Institute of Chemistry Chinese Academy of Sciences , Beijing, 100190, China
| | - Heng Liu
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, China
| | - Xuefei Wang
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, China
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials & Devices, South China University of Technology , Guangzhou, 510640, China
| | - Yongsheng Zhao
- Beijing National Laboratory for Molecular Science (BNLMS) and Key Laboratory for Photochemistry, Institute of Chemistry Chinese Academy of Sciences , Beijing, 100190, China
| | - Zhiyuan Tian
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, China
| |
Collapse
|
16
|
Organic Nanomaterials with Two-Photon Absorption Properties for Biomedical Applications. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/978-94-017-7315-7_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
|
17
|
Zhang X, Wang K, Liu M, Zhang X, Tao L, Chen Y, Wei Y. Polymeric AIE-based nanoprobes for biomedical applications: recent advances and perspectives. NANOSCALE 2015; 7:11486-508. [PMID: 26010238 DOI: 10.1039/c5nr01444a] [Citation(s) in RCA: 332] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The development of polymeric luminescent nanomaterials for biomedical applications has recently attracted a large amount of attention due to the remarkable advantages of these materials compared with small organic dyes and fluorescent inorganic nanomaterials. Among these polymeric luminescent nanomaterials, polymeric luminescent nanomaterials based on dyes with aggregation-induced emission (AIE) properties should be of great research interest due to their unique AIE properties, the designability of polymers and their multifunctional potential. In this review, the recent advances in the design and biomedical applications of polymeric luminescent nanomaterials based on AIE dyes is summarized. Various design strategies for incorporation of these AIE dyes into polymeric systems are included. The potential biomedical applications such as biological imaging, and use in biological sensors and theranostic systems of these polymeric AIE-based nanomaterials have also been highlighted. We trust this review will attract significant interest from scientists from different research fields in chemistry, materials, biology and interdisciplinary areas.
Collapse
Affiliation(s)
- Xiaoyong Zhang
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | | | | | | | | | | | | |
Collapse
|
18
|
Xiang J, Cai X, Lou X, Feng G, Min X, Luo W, He B, Goh CC, Ng LG, Zhou J, Zhao Z, Liu B, Tang BZ. Biocompatible Green and Red Fluorescent Organic Dots with Remarkably Large Two-Photon Action Cross Sections for Targeted Cellular Imaging and Real-Time Intravital Blood Vascular Visualization. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14965-14974. [PMID: 26094687 DOI: 10.1021/acsami.5b03766] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Fluorescent organic dots are emerging as promising bioimaging reagents because of their high brightness, good photostability, excellent biocompatibility, and facile surface functionalization. Organic dots with large two-photon absorption (TPA) cross sections are highly desired for two-photon fluorescence microscopy. In this work, we report two biocompatible and photostable organic dots fabricated by encapsulating tetraphenylethene derivatives within DSPE-PEG matrix. The two organic dots show absorption maxima at 425 and 483 nm and emit green and red fluorescence at 560 and 645 nm, with high fluorescence quantum yields of 64% and 22%, respectively. Both organic dots exhibit excellent TPA property in the range of 800-960 nm, affording upon excitation at 820 nm remarkably large TPA cross sections of 1.2×10(6) and 2.5×10(6) GM on the basis of dot concentration. The bare fluorophores and their organic dots are biocompatible and have been used to stain living cells for one- and two-photon fluorescence bioimagings. The cRGD-modified organic dots can selectively target integrin αvβ3 overexpressing breast cancer cells for targeted imaging. The organic dots are also applied for real-time two-photon fluorescence in vivo visualization of the blood vasculature of mouse ear, providing the spatiotemporal information about the whole blood vascular network. These results demonstrate that the present fluorescent organic dots are promising candidates for living cell and tissue imaging.
Collapse
Affiliation(s)
- Jiayun Xiang
- †College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Xiaolei Cai
- §Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585
| | - Xiaoding Lou
- ∥School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guangxue Feng
- §Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585
| | - Xuehong Min
- ∥School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wenwen Luo
- ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Bairong He
- ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Chi Ching Goh
- ⊥Singapore Immunology Network (SIgN), A*STAR (Agency for Science Technology and Research), Biopolis 138648, Singapore
| | - Lai Guan Ng
- ⊥Singapore Immunology Network (SIgN), A*STAR (Agency for Science Technology and Research), Biopolis 138648, Singapore
| | - Jian Zhou
- †College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Zujin Zhao
- †College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
- ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Bin Liu
- §Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585
| | - Ben Zhong Tang
- ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| |
Collapse
|
19
|
Neto BAD, Carvalho PHPR, Correa JR. Benzothiadiazole Derivatives as Fluorescence Imaging Probes: Beyond Classical Scaffolds. Acc Chem Res 2015; 48:1560-9. [PMID: 25978615 DOI: 10.1021/ar500468p] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This Account describes the origins, features, importance, and trends of the use of fluorescent small-molecule 2,1,3-benzothiadiazole (BTD) derivatives as a new class of bioprobes applied to bioimaging analyses of several (live and fixed) cell types. BTDs have been successfully used as probes for a plethora of biological analyses for only a few years, and the impressive responses obtained by using this important class of heterocycle are fostering the development of new fluorescent BTDs and expanding the biological applications of such derivatives. The first use of a fluorescent small-molecule BTD derivative as a selective cellular probe dates back to 2010, and since then impressive advances have been described by us and others. The well-known limitations of classical scaffolds urged the development of new classes of bioprobes. Although great developments have been achieved by using classical scaffolds such as coumarins, BODIPYs, fluoresceins, rhodamines, cyanines, and phenoxazines, there is still much to be done, and BTDs aim to succeed where these dyes have shown their limitations. Important organelles and cell components such as nuclear DNA, mitochondria, lipid droplets, and others have already been successfully labeled by fluorescent small-molecule BTD derivatives. New technological systems that use BTDs as the fluorophores for bioimaging experiments have been described in recent scientific literature. The successful application of BTDs as selective bioprobes has led some groups to explore their potential for use in studying membrane pores or tumor cells under hypoxic conditions. Finally, BTDs have also been used as fluorescent tags to investigate the action mechanism of some antitumor compounds. The attractive photophysical data typically observed for π-extended BTD derivatives is fostering interest in the use of this new class of bioprobes. Large Stokes shifts, large molar extinction coefficients, high quantum yields, high stability when stored in solution or as pure solids, no fading even after long periods of irradiation, bright emissions with no blinking, good signal-to-noise ratios, efficiency to transpose the cell membrane, and irradiation preferentially in the visible-light region are just some features noted by using BTDs. As the pioneering group in the use of fluorescent small-molecule BTDs for bioimaging purposes, we feel pleased to share our experience, results, advances, and personal perspectives with the readers of this Account. The readers will clearly note the huge advantages of using fluorescent BTDs over classical scaffolds, and hopefully they will be inspired and motivated to further BTD technology in the fields of molecular and cellular biology.
Collapse
Affiliation(s)
- Brenno A. D. Neto
- Laboratory
of Medicinal and
Technological Chemistry, University of Brasília (IQ-UnB), Campus Universitario Darcy
Ribeiro, Brasilia 70904970, P.O. Box 4478, DF, Brazil
| | - Pedro H. P. R. Carvalho
- Laboratory
of Medicinal and
Technological Chemistry, University of Brasília (IQ-UnB), Campus Universitario Darcy
Ribeiro, Brasilia 70904970, P.O. Box 4478, DF, Brazil
| | - Jose R. Correa
- Laboratory
of Medicinal and
Technological Chemistry, University of Brasília (IQ-UnB), Campus Universitario Darcy
Ribeiro, Brasilia 70904970, P.O. Box 4478, DF, Brazil
| |
Collapse
|
20
|
Tang Y, Zhang C, Wang J, Lin X, Zhang L, Yang Y, Wang Y, Zhang Z, Bulte JWM, Yang GY. MRI/SPECT/Fluorescent Tri-Modal Probe for Evaluating the Homing and Therapeutic Efficacy of Transplanted Mesenchymal Stem Cells in a Rat Ischemic Stroke Model. ADVANCED FUNCTIONAL MATERIALS 2015; 25:1024-1034. [PMID: 26290659 PMCID: PMC4539160 DOI: 10.1002/adfm.201402930] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Quantitatively tracking engraftment of intracerebrally or intravenously transplanted stem cells and evaluating their concomitant therapeutic efficacy for stroke has been a challenge in the field of stem cell therapy. In this study, first, an MRI/SPECT/fluorescent tri-modal probe (125I-fSiO4@SPIOs) is synthesized for quantitatively tracking mesenchymal stem cells (MSCs) transplanted intracerebrally or intravenously into stroke rats, and then the therapeutic efficacy of MSCs delivered by both routes and the possible mechanism of the therapy are evaluated. It is demonstrated that (125)I-fSiO4@SPIOs have high efficiency for labeling MSCs without affecting their viability, differentiation, and proliferation capacity, and found that 35% of intracerebrally injected MSCs migrate along the corpus callosum to the lesion area, while 90% of intravenously injected MSCs remain trapped in the lung at 14 days after MSC transplantation. However, neurobehavioral outcomes are significantly improved in both transplantation groups, which are accompanied by increases of vascular endothelial growth factor, basic fibroblast growth factor, and tissue inhibitor of metalloproteinases-3 in blood, lung, and brain tissue (p < 0.05). The study demonstrates that 125I-fSiO4@SPIOs are robust probe for long-term tracking of MSCs in the treatment of ischemic brain and MSCs delivered via both routes improve neurobehavioral outcomes in ischemic rats.
Collapse
Affiliation(s)
- Yaohui Tang
- State Key Laboratory of Oncogenes and Related Genes, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Chunfu Zhang
- State Key Laboratory of Oncogenes and Related Genes, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jixian Wang
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Xiaojie Lin
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Lu Zhang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yi Yang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yongting Wang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhijun Zhang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jeff W. M. Bulte
- Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, Cellular Imaging Section, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Guo-Yuan Yang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China
| |
Collapse
|
21
|
Keating ME, Byrne HJ. Raman spectroscopy in nanomedicine: current status and future perspective. Nanomedicine (Lond) 2013; 8:1335-51. [PMID: 23914968 DOI: 10.2217/nnm.13.108] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Raman spectroscopy is a branch of vibration spectroscopy that is capable of probing the chemical composition of materials. Recent advances in Raman microscopy have significantly added to the range of applications, which now extend from medical diagnostics to exploring the interfaces between biological organisms and nanomaterials. In this review, Raman is introduced in a general context, highlighting some of the areas in which the technique has been successful in the past, as well as some of the potential benefits it offers over other analytical modalities. The subset of Raman techniques that specifically probe the nanoscale, namely surface- and tip-enhanced Raman spectroscopy, will be described and specific applications relevant to nanomedical applications will be reviewed. Progress in the use of traditional label-free Raman for investigation of nanoscale interactions will be described, and recent developments in coherent anti-Stokes Raman scattering will be explored, particularly its applications to biomedical and nanomedical fields.
Collapse
Affiliation(s)
- Mark E Keating
- Focas Research Institute, Dublin Institute of Technology, Camden Row, Dublin 8, Ireland.
| | | |
Collapse
|
22
|
Fischer I, Kaeser A, Peters-Gumbs MAM, Schenning APHJ. Fluorescent π-conjugated polymer dots versus self-assembled small-molecule nanoparticles: what's the difference? Chemistry 2013; 19:10928-34. [PMID: 23843202 DOI: 10.1002/chem.201301258] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Indexed: 11/10/2022]
Abstract
Fluorescent nanoparticles based on π-conjugated small molecules and polymers are two different classes of π-conjugated systems that have attracted much interest. To date, both emerging classes have only been studied separately and showed no clear differences in their properties. Herein these nanoparticles are compared on the basis of a fluorene co-polymer and its corresponding small molecule. Both systems formed nanoparticles with the same diameter, whereas the fluorescence properties clearly differed. In case of the polymer the fluorescence diminished, whereas for the small molecules the fluorescence increased. In addition, the capability of encapsulation and release of a hydrophobic dye from the fluorescent nanoparticles was studied. For the polymer system, encapsulation was highly efficient and no release was observed, whereas for the small molecule system encapsulation was less efficient and release of the dye was observed. These studies show a clear difference between small molecules and polymers which has important implications for the design of fluorescent nanoparticles.
Collapse
Affiliation(s)
- Irén Fischer
- Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | |
Collapse
|
23
|
Huang Y, Hu L, Zhang T, Zhong H, Zhou J, Liu Z, Wang H, Guo Z, Chen Q. Mn₃[Co(CN)₆]₂@SiO₂ core-shell nanocubes: novel bimodal contrast agents for MRI and optical imaging. Sci Rep 2013; 3:2647. [PMID: 24026007 PMCID: PMC3770959 DOI: 10.1038/srep02647] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 08/28/2013] [Indexed: 12/22/2022] Open
Abstract
Nanoprobes with dual modal imaging of magnetic resonance imaging (MRI) and two-photon fluorescence (TPF) can serve as promising platforms for clinical diagnosis. A wide range of molecules and nanoparticles have been investigated as agents for contrast enhanced MRI and fluorescence imaging in cancer diagnosis. However, a single material with dual modal imaging of MRI and TPF is rarely reported. We found that Mn₃[Co(CN)₆]₂@SiO₂ nanocubes can serve as agents for both T₁- and T₂-weighted MRI, and TPF imaging. The nanocubes coated with silica to form Mn₃[Co(CN)₆]₂@SiO₂ core-shell nanocubes were readily internalized by cells without showing cytotoxicity. In vitro tests, the core-shell nanocubes display relatively high longitudinal (r₁) and transverse (r₂) relaxivities, they also manifest a remarkable T₁ and T₂ contrast effects at in-vivo imaging of internal organs in Mice. Moreover, the core-shell nanocubes could offer high-resolution cell fluorescence imaging by two-photon excitation (720 nm) or by conventional fluorescence with 403- or 488-nm excitation.
Collapse
Affiliation(s)
- Yimin Huang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Lin Hu
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Tingting Zhang
- Radiology Department of the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Hao Zhong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Jiajia Zhou
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Zhenbang Liu
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Haibao Wang
- Radiology Department of the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Zhen Guo
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Qianwang Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| |
Collapse
|